Steve,
http://www.vintagegungrips.com/index.html
I have gotten nice plastic ones for several of my Ruger shooters. Quality is pretty good.
Go to their "Price List" page and you will see 7-8 pages of grip offerings. They even have some photos and carry a few luger grips as well...
Regards,
Pete... <img border="0" alt="[typing]" title="" src="graemlins/yltype.gif" />