I would suggest upgrading to G2 James, who can then wear ANY of the G2 male conforming clothing items.  It's free for Poser owners (in the drop-down box, choose the G2 James and Jessi option for Poser owners; you'll have to input a valid serial number)  G2 James is slightly more up-to-date in terms of mesh, rigging, etc. anyway.

http://www.contentparadise.com/productDetails.aspx?id=93

Regardless, your best bet is the Content Paradise marketplace for conforming clothing. Search for James...

http://www.contentparadise.com/SearchRanked.aspx?searchText=james

Or G2 Male Clothing...

http://www.contentparadise.com/SearchRanked.aspx?searchText=g2%20male%20clothing

If you search around for freebies (here at Renderosity and elsewhere), you can search for G2M or G2 Male and find some stuff. There's not a lot.

Keep in mind that if you use G2 James, you can use G2 Simon's conforming clothing on him...which is cool. Check the default Poser runtime PROPS directory for conforming clothing for either the old James (if you use the old James) or the G2 Simon (whose clothes work on G2 James).

ALSO, some of 3Dream's older hair (for sale here at Renderosity) works on either James. Use the prop version of the hair and choose the appropriate hair fit (or move the hair around using x/y/z trans dials).

http://www.renderosity.com/mod/bcs/index.php?vendor=3Dream&TopID=268277

http://www.renderosity.com/mod/bcs/vendor/plus3d

Hope this helps!

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