Gentlemen, The original Doc Haddaway lock was produced from a mold which replicated a 1790 John Bonewitz rifle. It is a suburb example of workmanship and replication. If I remember correctly they were on the market after Hamm and before Siler. They can be found but are few and far between. The only other lock which does justice to the lock design used by Bonewitz and the Womelsdorf school is currently offered by Jack Brooks, Colorado.
A while back I ran into Haddaway's son. He had 4 locks that he didn't want to part with at the time. I tried and I tried and I tried again but to no avail. So if you find one consider it a treasure. HIB