Any smith worth his salt should be able to make a firing pin if you still have the old parts that can be used as an example.
That is a good way to find out if he is a smith or parts swapper.
"A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."
Life Member NRA
Life Member NAHC
Former President of the ECPT (Eifel Combat Pistol Team)