Where to get gilmer drive belt before the weekend?

alright, so i need a new belt for my waterpump/alternator as im currently running on my spare right now, and i dont like not having a backup. im running a pro comp gilmer belt drive setup on my sbc. besides ebay, the only place i know of that carries the belts is jegs, however they wont be in stock until the 13th, and im taking the truck to an out of town show on the 12th. im looking for part number 405L150HSN it is 40.5" long and 1.5" wide. anyone know where i can find one or who would be able to order it so i can get it in by this weekend? thanks…