I recently bought a L2501, so my 54" snowblower is too narrow now. It would've cost 2.5k$ to exchange for a new 66" blower. So I decided to build a set of wings. I get 4" more each side. I have no idea how well that's gonna work but it's worth to try. 30$ worth of metal.
Looks good and they'll work fine. You will likely need to go just a tad slower to give the blower a chance to eat. I made them for the last tractor that wore a 64" Pronovost: