I'm not aware of any kind of master database, I just have my favorite creators that I use almost exclusively, namely Marvine, BeosBoxBoy, and GeneralZoi. But if I ever come across one that I don't use often, I'll bookmark it or write down the web address for it somewhere.
~ Syn
Edit: Oh, but if it IS Marvine/BeosBoxBoy meshes you are looking for, they have been kind enough to archive those. The first archive is
here, and then there is a link to the second and third archives in that first post.