You can find belts and tires at
www.studiosoundelectronics.com They have a great cross reference service - if you tell them the model, they will hook you up with the correct generic replacements. Might as well replace the pinch roller too, then you'll have all new rubber. They are also about the only place for dedicated VCR tools these days - the tiny Allen wrenches, guide post and A/C head adjusters, even that VCR tool kit you used to see all the time in the 80's.