The one you picture looks to be a Thompson Center or Lyman GP lock and would be way to big. CVA used the same lock for all their rifles and pistols for many years so keep checking ebay or bight the bullet and order the L&R replacement lock. Much more expensive but it is a top quality lock and...
Built from misc. mostly modern parts. The breech plug and tang look to be from a Thompson Center Hawken flintlock with a drum and nipple screwed into the touch hole. Lock is CVA.
