I trust what Horilka writes as he is meticulous in his research, but I too wonder if small numbers of RC weapons made it into Canada prior to 1991. However, I am doubtful that the sale of any milsurps from the arsenals to the West would have been sanctioned by Soviet authorities. That's just my speculation.
What led me to pose this question is that there are some pieces I've encountered from long time collectors (fellows in their 70's and up) who own/owned examples of German firearms that have similar characteristics to Russian Capture - electro penciled bolts, plumb/gold bolts, force matched parts, shellac stocks, ect. I even examined an MG34 in a museum vault that had a hodge-podge bolt that was electro-penciled in a similar script to those found on RC firearms, and it had been in the collection for decades.
Is it within the realm of possibility -I'm theorizing here - that some of this could have been done domestically (North America) back in the '50s-'70s when these were relatively cheap, numerous and not considered collectible? If a wholesale supplier bought a pile of German arms from say the U.S. or CDN Govt. ( think of Lever's warehouse of SVT-40 crates), and just mixed parts to make cheap shooters? Could this account for some of the stuff in long term collections that looks like RC, but was here before RCs hit the North American market? Or have I just been in the garage too long working on my Buick with the door closed?