You can get T/C Encore extra barrels in Canada and they are meant to be interchangeable in the hands of the user. For the NEF Handi-Rifle any competent gunsmith should be able to fit them for you if you can get them, but I think they aren't retailed. (I did ask around once, and no one knew of a retail source in Canada. If you do happen to get an extra rifle barrel, make sure you aren't having it fitted to a shotgun receiver, as they aren't designed to handle the rifle
calibres, while a rifle receiver can be safely used for a shotgun barrel, according to NEF.)
The NEF factory prefers to do the fitting themselves, probably for product liability concerns and quality control, but they only offer this service for U.S. customers, probably because of the paperwork for re-exporting a gun that has been previously exported in a different calibre and registered in a foreign country :roll: For the money that they could reasonably ask, I don't blame them. (And what a pity for us, because they will lighten the trigger for you for no extra charge when they fit a new barrel.)
I've got a Handi-Rifle in .223 because I asked Saskatoon Gun Works to order one for me if NEF resumed exporting to Canada (they had a hiatus a couple of years ago) and they did. I like it so much I wish I had thought at the time of BIGREDD's suggestion - if the importer buys them with multiple barrels fitted, I'm sure NEF will be happy to set them up and export them that way, as obviously it is happening with the .22LR/.410 shotgun combinations. Alternately, the Rossi combinations suggested here, since they are stocked by some retailers (S.I.R. that I know
of, and the link juanvaldez gave) are a quick and easy answer, if that happens to be the combination of calibres that you want.)
If anyone local is thinking of this and would like to try a Handi-Rifle before they commit to ordering a combination of several calibres they are welcome to try mine out.