I have a custom knife with a micarta handle that looks real good and
it is not endangered.
Pretty wood is also an option.
Never been a fan of "pretty-ing" up a gun. If something gets changed it's for functions sake, not because I want to impress the guy next to me at the range. And faux plastic "ivory" grips on a revolver aren't going to impress anyone. Might provide some comic relief, though.