The "hammer" on a flintlock is called a C0CK. (I shall refain from further comment, given your relationship with MD) The frizzen will likely be just fine.

Some people have replaced the Lyman C0CK and their early model TC C0CK with the TC redesigned one to improve the angle at which the flint strikes the frizzen. They claim better spark and longer flint life. I haven't done that, so can't recommend for or against it.