Revolver guys tend to specialize by maker. What do you have?
What make is it and what needs to be done? Both TSE and CSC have gunsmiths.
If it's a S&W, Murray Charlton in BC would be my choice. Waiting for parts from S&W can take a long time, though.
Murray Charlton Enterprises
Long time Smith and Wesson warranty depot... good guy... used to own and operate MDC. Google Murray Charlton Enterprises