Don't confuse the lock from Track of The Wolf marked "Willits" with an India made lock with the same name, please. Veteran Arms locks are of India origin. I have such a lock marked "Willits" from Loyalist Arms in Canada, of Indian origin.
A simple blacksmith will NOT have the necessary knowledge to properly harden a frizzen. There is a good chance it will not be done right, it may shatter, or it may become so brittle that it shatters when used. Hardening an India made frizzen is the same basic procedure as hardening any frizzen, but there are subtle differences between the steel used in an American frizzen, an Italian frizzen, and an Indian made frizzen. (i.e. some do well with tempering after heating and quenching...some do not.)
The first thing would be to see if V.A. will adjust the lock for you as suggested. There is a difference between "adjusting" a lock, which is rather quick and simple, correcting a frizzen hardness, which is also pretty simple, and an actual "tuning" of the lock, which is much more involved.
I hope it is actually a V.A. gun. I have serviced about a dozen Indian Bess muskets over the past few years, and I have been told by owners of muskets it was from X company when it was really from Y company. Not that much of a difference, but it would be if it's not a V.A. import.
LD