A co-worker of mine has a 322 with a Yanmar gas engine. He has an older 2 stage 47 inch snow blower for it, but it is not at all like the modern 47 inch snow blower. A gear in the gearbox, as well as a couple other parts have worn out, and I was surprised when he told me his dealer said parts were no longer available for it. He dates it around 1989. Is that true that parts really are not available anymore? If so, are there other options like putting a modern 47 inch blower on it?