Outdoor Power Equipment (Lawn Mowers, Snow Blowers, Chain Saws and more) Discussions

I am looking for parts for a Noma 9hp snowblower.  Home Depot sold them a number of years ago and I am helping a friend fix one.  The part we need is a plastic circle at the bottom of the chute.  It is basically a plastic ring that has slots cut into it to accomodate the chute adjuster.  The chute it turned by a steel rod with a spring-like configuration at the bottom .  The spring-like part fits into the plastic slots on the part that I need as it is turned to adjust the chute position.  I am sure this is similiar to other machines.  I did find one site on the internet but their part was for a much smaller machine.  I would hate to junk a good running machine for a cheap plastic part.  Does anyone know of a source for Noma parts?  Thanks for the help.  I am sure there is snow coming real soon!!!