I've been debating purchasing one of those metal kits myself, which are reported to be mostly reproduction parts. I have bought some of their spring and screw kits, which also contain some repro parts and the quality is hit or miss. But original parts can be tough to find, especially if you need it "now." Even on eBay it can be very expensive and time-consuming to track down original parts, so I'd say take a chance on the Sarco kit. You can always return it if it's total garbage.