I have a system in my 240, and it seems everytime i blast it the Alternators belt slips. So i was told the easiest and cheapest thing to do is add another battery, which i will do, but also the BEST thing is adding a better alternator. So i looked for one to see how much they are, and i cant find any, just oem. Anybody know a place I can find one, or how much cash it is for one?