They do, and they do fit. Just look at the cover of this book. The werewolf in the middle is one of the guys from Verdun Manor at Thrillvania in Texas, and has been active in the fandom for a very long time. I've seen them at more than one convention.
Fursuits are much more than the "toony" ones. Many of us are aficionados of the "rarsuit", ones that are more realistic or monster-like in their designs.
Unfortunately, neither of those two books fit your description, perfectly.