O/T Pantyhose for alternator belt. (Doubt it would work with the one-belt-does-all serpentine belts, BTW)RSBM / BBM... but I have to ask!!!
While on a trip up CA101, one of the bolts holding my alternator on (an old '75 one ton truck with a tool bed) sheared off, so the alternator flopped down and wouldn't charge the battery. The threaded part of the bolt was stuck in the block. The belt got broken. It was about 1:30 at night. I searched through the bins in the truck, trying to figure out how to get back on the road. Buried in the back of the truck was a pair of pantyhose (I still have no idea how they got there....) and, of course, tie wire (for tying up wooden frames for concrete work-no, I don't do concrete work, but the wire is very malleable). I put the remainder of the bolt through the alternator bolt holes, used the wire to tie it in place and attached it to the engine mounts, then took the pantyhose (both legs), wrapped them around the pulleys for the alternator and fan, pulled with everything I had, and knotted the pantyhose (cutting off the extra). The advantage was that the knot was small enough to fit in the pulleys and not jump track. I made it from Lompoc, CA to San Luis Obispo, CA (about 60 miles) and to the place I needed to be the next morning with that set up. (I fixed it the right way at lunch.) Anyone else's mileage on this fix may vary, but that's why I keep a pair in my emergency bag.