Woodcraft does offer woodworking classes, and most of the guys working there are retired and are woodworkers. A few of them might be able to make the grips, but I'd be very surprised if they could checker the grips. But maybe.
mete's point about soft woods and dense woods is something that needed to be mentioned. Probably wouldn't need much of a finish of any sort on some of the waxy/oily tropical woods. And I do believe I have some spalted Pecan left. The stuff is beautiful, and would be super eyecatching on a pistol, but would need to be stabilized in some fashion to hold up as a pistol grip. The wood is rather soft.