Tillers

I have a craftsman tiller model # 917299882 and cant find parts for this tiller, I have been directed to you guys, as this tiller was manufactured by American Yard Products that husqvarna does as well needing parts # 8372J a gasket and parts #8359J a pinion for this tiller. Do you guys know of any parts number that is interchangeable for these two parts or any information that would be of help??? Thank You so much for your time..