Y didn't say, lad, are ya looking for a firing reproduction or no? Most of the sources that sell live firelocks seem to have been havin trouble finding decent wheelocks lately. I suspects most of this stuff is coming out of India and Pakistan, and a lot of the vendors have suspended sellin em because apparently the stuff they're getting has been....well....crap, ....or unpredictable at best. some good sources for the live locks are:
The Rifle Shop
and
Loyalist Arms and Repair