A QA42A or a 42B, a QA36A or B, a 451 will also fit, I have just aquired a 451 that I'm gonna use this winter and my QA42A is gonna stay parked in the corner.
Jochua, I believe any wideframe snow blade should fit except the Haban made blade which was for the longer wheelbase 982, 1872, 2072, etc and later models. One other difference between the wideframe blades, I believe there is a different lift bracket (see pic below) that mounts on the blade that protrudes farther out to clear the side panels on the 82 series.