I need to get a knuckles texture for a model im working on, and im pretty sure that there was one on sonic.
Do you mean this one?
http://forums.kc-mm.com/Gallery/BrawlView.php?Number=2374
Sorry :p, i need a one slot texture.
Just export the texture and apply it to your model. The only reson it's one-slot is because it needs a PSA for the head, you can still rip all of the textures and put them on a 1-slot.
Mastaklo didn't make a head texture for Knuckles because sonic didn't need a head in the first place.