I have a Craftsman 217.250260 with a 50-inch mower deck. The engine is a 20 Hp Kohler Magnum. The tractor has the 6-speed gear drive transmission. I need a Grass Catcher which will fit the tractor and Mower exit port. I did buy a 3 bagger grass catcher ( 917.249920) It fits nice to the tractor but the lower chute DOES NOT MATCH the Mower DECK. Any help with part numbers or a place to order it would be great.