So don't build from a kit. If you have already built a kit, you are ready to try one from a blank. Left had locks are not that hard to find. I learned many years ago, buy all the parts you can when you have a few extra bucks or you can get them cheap. I have about 30-35 locks, boxes of buttplates and triggerguards with barrels and stock blanks. I just had somebody come by the shop this evening with a box of old back action locks, all in pretty good shape he had bought at a flea market for $15.00, sold them to me for the same amount. I bet there are 50 locks in there. if only one of them is any good I came out ahead. If not, I have a ton of screws, springs etc for other uses. You can make all the other parts like ramrod thimbles, side plates etc from sheet stock. That way it will be YOUR gun and not just a bunch of parts you stuck together the way someone else thought it should go.