My ballast sack has a leak coming out of the exsaust (drivers side) port right were the hose is attatched to the bag. I think the guy who had it before me put in a bigger bag, (said it hold 800lb). I was thinking of just seeling it shut and just make sure it is empty of air before filling. Is there a cheaper aftermarket one that will fit. The one on here is $400. Thanks Bart