[JRTJH]

I'm sure there are several, if you do a Google Search for RV Salvage Yards in Canada you'll get several. You'll need to go through the list to see what's a "major salvage yard" and what's "two old motorhomes listed on Craig's List"... But, yup, there's RV salvage in Canada too....

Added: Two in BC that come up are Scrap Chief in Malahat, BC, Canada and
West Coast RV Parts in Port Coquitlam, BC, Canada