I have a few that I made on my site. As for how good they are, I'll leave that up for you to decide. But I have gotten good comments about them. You can find them at:
Warped Productions skins
Also, there are many skins at jedioutcastii.net, massassi.net, jk2files.net, and jedi-outcast.com.
Hope that helps you find what you are looking for.