If you do find one, don't spend over $75 on it unless it has been seriously reworked. The lock parts are not hardened, the springs are junk and the frizzen won't spark. The stock needs to have about 20% of the wood removed. I had two of them and had to completely rebuild them to get them to shoot. I sold them off to some Pyrate wannabees to carry around as costume accouterments.
Many Klatch