Craig, I have made several sets of grips for a 1911A1 colt and also a Molina. The Luger is a nightmare, in the sense of lots of fitting, ups and downs, and cut out area for the safety, mag release etc. That is why the mass produced ones are a sloppy fit, there are too many variations out there.
I have been looking for some antler grips for a while, and they are expensive, due to the complexity (that and I was slow on the draw when offered!
)
Ed