These are some resources I use to find parts for my sleds. Also other links that are important to our sport.
Todd Plzak is my cousin down in Fredonia, Wisconsin. His Small Engine Repair Business keeps him busy and he occasionally he gets Diablo parts and sells them.
Below is Ivan from Arts Parts.
Art's in Cornell, Wisconsin offers new and used parts for all sorts of Snowmobiles and ATVs. These are some of the nicest people you will ever meet. Almost all their parts are stored inside and well organized (however, they don't currently have Diablo and Hus Ski parts). You can call Ivan (above), Jeff, Russel or any of the guys at Art's at 715-288-6863. Tell em Bruce sent ya!
Pro Tool & Plastic can reproduce many plastic parts and they are also Vintage Snowmobile people. Give Brian a call at the site below.
Association of Wisconsin Snowmobile Club
Rooster's in Woodland, Wisconsin Roosters has some Diablo and Hus Ski parts.