The process is pretty simple, if you have the time/$/motivation
1) Send and email to (or call) the friendly guys at the RCMP firearms lab
2) Tell them what you want to do/import
3) They'll probably ask for technical drawing of said airgun http://www.edgun.ru/upload/iblock/b9b/b9b604eea51e3515d352d5a59031e8c8.JPG
4) They'll look at it tell you what they "initially" don't like about it (in 2016-2017, they didn't like the baffles, threaded end cap and dimension of the expansion chamber would need to be different, as to not accept readily available baffles)
5) Contact Edgun, to see if they are interested in producing a prototype with said modifications
6) If he's ok, get back to the firearms lab. They'll send you a letter so that you can obtain a import permit from Global Affairs Canada. Along with shipping information to them.
7) Pay Edgun to make prototype, and wait for it to shipped
8) Wait for the the firearms lab to inspect it...
9) If they approve, a FRT will be created... and the rifle can be shipped to you... If not, well, you still need to have it shipped out of the country and find someone to buy it...
A RTI Priest would probably be easier, as they simply need to establish that it was designed from the get-go as a bullpup