Audiophiles gonna hate but:
A semi inner tube can provide a perfectly serviceable turntable drive belt. Just use sharp scissors and cut across the tube to get the correct width. These last longer than the “real” ones do, too!
I have restored the operation of many VCRs and under dash 8-track tape players with rubber bands from those large rubber band assortments sold in store’s stationery sections. I have been informed that many drive belts in high-end cassette decks are just standard O-rings, but I’ve never ventured into one of those. Yet.