thgknobs is a one man shop(a guy named Roger). I've ordered from him before and seen his work close up and it's gorgeous. He builds the knobs after he gets the order(i.e., there's nothing stock on the shelf). Pricewise, it's worth to you what it's worth to you. If you sent him a picture of your guitar he'd do his best to match it with something close or complementary. Obviously, this kind of builder generally works with folks getting ground up custom guitars where the price of the instrument can easily dwarf the price of even a Fly Artist.