Hello, new to the group. I just picked up an original 361-520 MTD. It does not run. I am looking to restore with my grandsons. I want to keep as original as possible. It is missing the air cleaner and element. Tires are shot. Motor turns over it is a HS 40, seat is incorrect it looks like. I do have the torque converter cover and original band style brake. Where is the best place to sort original parts for this bike. Thanks in advance for your help