Case Coloring on Trigger and Hammer

[epidoc]

I acquired an N frame from the 1920's. The trigger and hammer have lost their case coloring. Who can refinish the trigger and hammer so they look like the correct S&W coloring?

 

[-db-]

Firearm Finishing services - custom firearm finishes, color case hardening, gun bluing services, rust bluing services, charcoal bluing services from Turnbull Mfg. Co.