After dicking around for many months trying to find a replacement belt for my trusty Philips cassette deck, by searching the Web, I did what I should have done first: went to my local electronics store, after having seen on a previous visit that they had an assortment of drive belts.
Well, it turns out not only did they have *a* belt which would fit, they had the *exact replacement*! And not only that, but they had the foresight to have saved a really old copy of the cross-reference book, which listed my unit (long out of production: I bought it in new in 1980).
So I'd like to sing the praises of what few remaining local electronics stores there are. Amazingly, around here (the San Francisco Bay Area), there are just a handful left, even in the high-tech South Bay (I'm not counting big places like Jameco here, but talking about old-school stores where you can walk in off the street and buy a few resistors or whatever).
And I'd like to give a shameless plug to this particular store, Al Lasher's Electronics in Berkeley on University Ave. They've been there forever; they have ton of stuff; they know what the hell they're talking about, and are not above helping the clueless customer who needs a replacement thingamajig for their old radio, computer setup, or whatever, find what they need; I hope they're there for a long time to come.