I took an old Troy Bilt model 42013 snowblower with a 5hp Tecumseh that was headed for scrap. It needs a new recoil starter and the box that houses the ignition/choke/throttle. I believe it was made in 1997 and when I try to look up part numbers everything comes up unavailable. Does anyone know where I can get replacement parts or if parts from other models are compatible? Thanks in advance for your help.