If you're hooking house balls, you've almost run out of options. However, you can pick up a NIB "plastic" or polyester ball on ebay for $9.95 + S/H. Make sure that the ball has only the pancake weight block.
Polish the heck out of it after you get it punched. If that still hooks too much, pay the $25 to take the lesson on how to throw the ball straight. In fact, if you already have a ball that's not supposed to hook alot, take the lesson first.
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Sixteen strikes...what do ya get? Another day older and deeper in debt...