Studio Sound Electronics was my go-to site for VCR belts and rubber parts, and they had a huge database of transport mech. photos indexed by make/model number.
Haven't needed to order from them for a couple of years - I always order a few extras of low-priced parts to save on shipping - but I just checked their website
http://www.iglou.com/studiosound/ and got a 404 Not Found.
I Googled and found a studiosoundelectronics.com site that works, but they only sell guitar amp parts. Is this the same company that had used to sell VCR parts or are they gone?
Where are you getting belts and idler tires from these days?