finepics?
i believe finepics and some folks on another forum (rwg?) were having 1:1 h style cg's made at about $100 a pop.
fyi, davidsen's cases and cg's are not 1:1, at least not with h series pams. everything from lug thickness, case thickness, and CG thickness is smaller...some significantly smaller (believe me, i have davidsen watches and i have gen 111h and other gens as well). the davidsen cases and cg's are not 1:1. they are smaller in almost every dimension. my gen 111h wears bigger than any rep i have in thickness, CG, lug thickness, etc.
the interesting thing about the gen h series CG (for historica luminors that is) is that it actually flares out so the portion farthest from the crown is thicker than than the portion closest to the crown/watch case. i tried to draw out what i mean below. so when you look at the CG from the side view of the watch, it is almost as thick as the watch case itself! this is what makes it look beefy and beautiful...and what no other rep i've seen to date has.
i tried to draw a picture as it's difficult with my lack of photo skills to show. this is a side view of the watch. the arrows show how the vertical thickness of the CG is greater at the outer edges, farthest away from the watch case...i hope that's what it shows
the reps don't do a good job with this, and tend to have "flat" CG's, and certainlly not as thick as gen H CG.