I have model 4970c jc penny belt sander. Are there any repair parts for this unit or is it a throw away unit?

I would guess it is at least 30+years old. For light weight work, HD has a Ryobi for $40. I have a Makita 3 x 21that I bought 10 years ago for $75. Get a decent brand or you will always be chasing parts. If it runs, get a tax write off at Goodwill!

Many thanks for your answer.