On the bright side...
It looks like Autozone in Alpine has an Idler Pully in stock for you...$16.00
808 E HOLLAND AVE
ALPINE, TX 79830
I know thats 80 miles from you...but if you talk real nice-like to 'em they MIGHT be willing to send their parts runner. Doubtful...but worth a shot.
I'm not sending PM's cuz I dont know if OP is checkikng those, but I know he's checking the open forum.