Ask Turpin. He does the best full-masks I've seen. The problem with a lot (most?) of the head-on sporrans around is that folks tend to take the taxidermy too far. Turpin can get a nice, life-like effect, while at the same time keeping the mask relatively flat.

...as soon as I'm able to swing it, I need to see if he might craft me a badger sporran w/closed eyes. Ahh...