Who are the artists for the old Xbox Avatar Marketplace outfits?

I'm curious why there's no specific credits for the Rare art team/artists who made a lot of the original 360 Avatar outfits and props anywhere; I'd like to follow more of their artwork but I've been digging all day and I can't find any specific names.
I did find a few freelancers online with a couple avatar costumes in their portfolios, as well as "Disruptive Publishers" who created a portion of them, but I'm sure there's a ton of artists from Rare who I just can't find the names of. It would be nice if
there was a credits section or an imdb page.

:)