The missing demos will be available within a few days from today 19 Sep 2020.
From this list of Canadian Rock Bands listed below, I was fortunate to see this first band when I was around 15 years old at the Bridgewater Memorial Hockey Arena in Bridgewater N.S. in the 1970's. The boys had not yet hit the big time (obviously) but I do remember that event well as the place was packed with a few thousand people and the music was awesome.
In case you're wondering why Neil Young isn't on this list of Canadian Rock Bands is because I have Neil Young listed as a folk artist but he would easily fit into this category with Crazy Horse so I'll add a link over to his yet unfinished page.
Neil Young And Crazy Horse
Some people may be wondering why an American Rock band is on this list of Canadian Rock Bands page. Well Steppenwolf was founded in LA by re-forming the original band called The Sparrows, which was a Canadian band. So in the beginning, Steppenwolf was actually Canadian and over time two American musicians joined the group, so this band, like "The Band" below, will end up on both nations pages.