I am not aware of these journals sharing a style with another journal already in the repository. However Experimental Physiology can be a dependent of The Journal of Physiology as they share styles.

A similar style I know of that could be used as a starting point is: The Journal of Neuroscience (Author-Date)

The style guide for The Journal of Physiology is here:
http://jp.physoc.org/site/misc/author.xhtml#refs

The style guide for Experimental Physiology is here:
http://ep.physoc.org/site/misc/author.xhtml#references

However, they lack sufficient detail. The following modifications needed to convert JN to JP style are also based on inspecting recent JP articles.

In the main text:

1. et al. should be ilalicised. Note that the full stop after et al. should be retained.

2. & should be used instead of and, e.g. (Bloggs & Bloggs, 2011) instead of (Bloggs and Bloggs, 2011)

3. Within a group of references, the primary order scheme should be chronological (as is currently the behaviour in JN style). But when a group of references includes citations from the same year, these should be ordered alphabetically, e.g. (Smith, 2010; Bloggs, 2011; Doe, 2011) instead of (Smith, 2010; Doe, 2011; Bloggs, 2011)

4. Letters used to disambiguate same author, same year papers are correctly placed, but they should be italicased.

In the bibliography:

5. Letters used to disambiguate same author, same year citations should be moved inside the year brackets and should be italicised e.g. Bloggs(2011a). instead of Bloggs(2011)(a)

6. For all entries, there should be a full stop after the year of publication, e.g. Bloggs (2011). instead of Bloggs (2011)

7. For all entries, there should be no comma between the penultimate and final author. Instead there should be an &. e.g. Bloggs J, Doe J & Smith J (2011). instead of Bloggs J, Doe J, Smith J (2011).

8. The order of entries should be made strictly alphabetical regardless of chronology, e.g. Bloggs J, Doe J (2011). should come before Bloggs J, Smith J (2010).

9. The title of journal articles and the title of books (in both book & book section entries) should be italicised.

10. The volume of a journal should be in bold font.

11. The journal volume should be followed by a comma, there should be a space before the page numbers, and there should be a full stop after the page numbers, e.g. J Physiol 500, 100-108. instead of J Physiol 500:100-108

12. If there is no volume/page number info for a journal article (e.g. an in press article), the DOI should be provided with a semicolon and space after the journal name, e.g. J Physiol; DOI: 12.1113/jphysiol.2001.013382.

13. For books, the publisher should be before the city and there should be a comma instead of colon between them, e.g. Humphrey Milford, London. instead of London: Humphrey Milford.

14. For book sections,
a) the edition of the book should be provided,
b) the formatting of the editor names should follow the formatting for the main authors of all entries, rather than have initials before surname.
c) eds. should be replaced with ed.
d) page numbers should be preceded by pp. instead of p.
e) Publisher should be provided before City, with a comma in between instead of colon.
e) the order of presentation of the book details needs re-arranging. Thus, the order should be: In [Book Name (italicised)], [edition], ed. [editors], pp. [page numbers]. [Publisher], [City].

e.g., In Gut Hormones, 2nd edn, ed. Bloom SR & Polak JM, pp. 119–124. Churchill Livingstone, Edinburgh.
instead of, In S. R. Bloom & J. M. Polak, eds. Gut Hormones Edinburgh: Churchill Livingstone, p. 119–124.

If possible:

15. When page numbers in zotero entries use short forms (e.g. 156-60), the bibliography should be forced to use the long form (156-160).

16. When titles of citations do not contain full stops in Zotero, they should be forced to end with a full stop in the bibliography,
e.g. Adrian ED (1932). The Mechanism of Nervous Action. Humphrey Milford, London.
instead of Adrian ED (1932). The Mechanism of Nervous Action Humphrey Milford, London.