I agree with TheGworks.
The stones from that German site look dead on for replicas. (If they are recasts from someone else's work, I don't approve that, of course.)
I have a bunch of HCG's stuff, and they usually do a great job. However, I'm disappointed that the stones the are producing seem to be so far off the movie version. I took some time to look through screenshots from the film, and couldn't convince myself to buy the HCG version. The crevices on the HCG stones are more deepset than they should be, the stone surface is less uniform (more wavy in places - likely due to casting problems), and the "age" cracks in the stones are more widened/prominent than the film displays. I have no issue with coloring, as they seem to be close enough.
It's really too bad. I was looking forward to these, and cannot see myself shelling out 700+ for the German version.