There's a Bonewitz on Michael Simen's site, I think it's Historicalarms.com. It sold so don't know how long the photos will be there. I second or third the KRA disc for Berks rifles. I'm in the middle of building one now, and am always looking at them for details, although I wish they'd taken about a dozen more from different angles, seems whatever spot I wonder I'm getting correct is hard to see!