Drive Belt for a Mastercraft X 2

Hey, I know this isnt the right place to post this, but I am looking for a quick answer. I keep my boat at a marina 45 minutes away from my school. It is a 2006 mastercraft x2 saltwater edition. The engine is a 330 hp crusader, I am pretty sure its the 5.7 liter one. It might be the 6.0 liter one though. I am sort of looking for answers for both. My drive belt broke and I need to replace it before I ride tomorrow. I was wondering if anyone knows what size belt I need or could help me find this part in like a NAPA directory. Any help is appreciated