Use this. You would only need four of them.
http://www.racquetballwarehouse.com/descpage.html?PCODE=EKO3B
power level of 3000.
Edit: Actually this is better. Power level of 3700-3800.
http://www.racquetballwarehouse.com/descpage.html?PCODE=EXO3AT
You should be able to find a way to wield three rackets.
But then I'd be at exactly 9000. I'd probably want to buy an 11th to make sure I went over, but then, how do I play with 11 racquets tied together?