Lawyers?
Tacoma had tours
Martin has tours
Ovation has tours
Hamer has tours
Check out the slide show.
http://travel.nytimes.com/2008/02/22/travel/escapes/22guitar.html?em&ex=1203829200&en=5448de13e19c5db8&ei=5087%0A
I'm pretty sure hell would freeze over, if it were me, if I let people into my shop to choose wood, unless they were an extremely special customer. I think they may have other reasons. Trade secrets? Don't want to be bothered with work flow interruptions. Tours would seem to be a doable thing, but they have their reasons.