78 colt da

[Glenn]

Got a fairly nice 78 Colt but it has a problem with wear on the hammer sear.  It will cock in single action but not as a double.  And the cylinder doesn't lock up worth a damn, but I assume this is as much bad design as anything else.  It does have a great barrel and I'd consider shooting it if I could get the hammer reworked and figure out a way to lock the cylinder a little better.  There was a guy over in Washington that worked on these but I've lost his address.  Any suggestions?