another cheap trick to check belts...
take a bar of soap and put it up against the belt with the engine running (be cautious of moving parts!!!) If the belts stops squeaking...that's your problem.
also, if you decide to go the shortbelt route...and can't find one that fits...I've found that taking the tensioner off and drilling a 1/2" hole a little north of the original works well. You can then reclock the tensioner and it provides that little bit of extra tension around the alternator pulley.
good luck