Thanks Gents, small sample size but I will go ahead and try. I seem to have accumulated a large hoard of Pieper/Bayard hammerguns and have found they are mostly interchangeable on the lock parts if same design. After paying to have a spring made, I found it can be cheaper to buy a basket case gun - sort of like cars and motorcycles. Easier to swap out an entire lock than to harvest a spring but they are often filthy.