Brafasco, Fastenall, Aklands Grainger or any bolt specific stores are all places you could get these bolts. I'm in Canada and work for Brafasco and get my guys these bolts all the time. M8-1.25x80 THREADED FULL LENGTH (what I use) is a standard thread metric bolt and shouldn't be that hard to find. Just make sure to ask for a TFL bolt (threaded full length). When you get into the metric fine threads is when the problems begin. The bolt is NOT bombardier specific. All you need to ask for is a M8x80 TFL and don't worry about thread pitch as it's coarse thread. I sell the bolts for $2.50 cdn plus tax and they are stainless at that.
Case Cook just came from there. They did not have any hex head metric that is threaded all the way down. I had to buy number 3 Phillips head bolt hopefully it will work