Yes, I make all my own Damascus. I'm pretty fanatical about sole authorship, and if I don't do everything, then I would feel guilty about putting my name on it.
Thats the neat thing about Mosaic Damascus...its nearly impossible to achieve the exact same pattern in any two billets, even it your trying to do it. Most folks who make it can get it close enough that you can identify it as basically the same pattern, but the subtle differences is what makes each piece unique.
Besides, where else can a guy play in fire all day long, and not get in trouble for it!