The Maktastik: The best recommendation I can give you is to find a 360 to PS3 converter, although I'm unsure if such a thing exists and is also effective. That is if you play on a control pad. If you play on arcade stick I recommend getting your arcade stick dual modded to work on PS3 and 360.
Also, if you play on arcade stick and worse comes to worse, you could try asking to borrow one from another player. Some should be willing to help you out.
I hope that info helps. Know that entry fee refunds for individual tournaments are available right up until the start of your first pool.