Where can I get this belt?! Help!

just ran into the EXACT same problem! i tried a 70.5 just barely short but you have to take into account the little bit of play that the tensioner uses. so, what i did is (since i know my belt over my smog was 84.5) is measure (with a string or tape measure) the same pulley route around my smog, and it came to be about 83.5, 1 inch short of the belt size i had on there. so, i measured the new pulley route bypassing my smog, and found it to be 72 in, so by using what i found from the 84.5 inch belt with the 83.5 true measurement, i know that i need a 73 in. belt (roughly) i'm actually going with a 72.5 bc my stock belt was somewhat loose. oh and as for measuring around the tensioner, when my belt is off my tensioner goes down far enough that there is a gap between the tensioner pulley and the bracket that bolts it down. and any belt size u need call autozone with the part number 4060_ _ _, the last 3 blanks are the size, so 72.5 would be 4060725, 73 would be 4060730. thats for a goodyear gator belt, not sure if you have a belt preference