I believe I do remember someone offering replacement locks but for the life of me don't remember who. Mine were both flinters and I never had any trouble with either lock. If my memory hasn't completely failed me Dixie offered a conversion from flint to percussion that required no more than unscrewing the flash hole liner and screwing in the drum & nipple and replacing the lock. I don't believe it was intended for frequent use.
Yes sir! Dixie did offer the conversion kit!
Here's the Dixie add I received today mentioning the rifle!