Serpentine Belt Replacement

Hi All,

I've hit most of the auto parts stores in the area looking for a replacement for my squeaking serpentine belt. They all seem to have the alternator belt, but no one seems to know anything about the dual-sided, longer belt that drives the rest of the accessories on the driver's side of the engine.

Any tips or tricks for replacement, for anyone that has done it?

Does anyone have an aftermarket source for these? I'd prefer the Goodyear Gatorback if possible, to match what I got for the alternator belt, but at this point I'll take anything.

--
Rob