A while back, while discussing some particularly poorly chosen dime-store scratch pantograph engraving on a rebuilt firearm, I pounded "hand engravers Canada" into Google, and came up with a whole bunch of sites of Canadian artists.
As with anything of this sort, skill levels vary, as do prices. Then you need to find someone that will touch gun parts. Be aware that other than the frame (with serial number) and the barrels of 12-6 class pistols (a prohibited device), there should be no legal issues with them having possession of the parts. But you should know by now that there are folks with their own opinions about such, and they can refuse, easily enough.
Surprisingly, or maybe not, there were quite a few pictures of guns and gun parts in the various galleries on the sites.
Worth doing some looking around at the options. I think that would make for a pretty cool present.
Cheers
Trev