Welcome to Hazzardnet CNH3201!
Luke's bear claw belt buckle is silver with turquoise and coral inlay for the palm and black enamel for the claws.
I bought one last year that I had custom made for me, identical to Luke's.
I bought it from a company located in Arizona. The company name is called Alltribes Indian Art. They specialize in making southwestern style buckles, jewelry, etc.
The maker of mine is semi retired, his name is Jackson. I don't know if he'll be able to still make one, but it's worth a shot calling them. Now I'll tell you, it was very, very pricey. But if he does make one. It'll be made of 100% sterling silver, authentic turquoise and red Coral. It'll look exactly like Luke's and the other member's belt buckle on here.
Hope this helps!