Here are a couple of amps that I think will do the job for you:
http://www.ebay.com/itm/NEW-HIFONICS-BRUTUS-BRZ1200-1D-CLASS-D-MONO-AMPLIFIER-/350487456806?pt=Car_Amplifiers&vxp=mtr&hash=item519aae2c26
People are gonna hate on Hifonics but even if they are overrated you still will be puttin a ton of power to those woofers
Next
http://www.ebay.com/itm/CADENCE-F1200-1D-2400-WATT-MONO-CAR-AMPLIFIER-AMP-KIT-/390320717295?pt=Car_Amplifiers&vxp=mtr&hash=item5ae0ed7def
Cadence Amps are great as well and this one even comes with an amp kit thats decent
Lastly,
http://www.ebay.com/itm/OKUR-A3-1500-1D-1500-WATT-MONO-CLASS-AB-CAR-AMPLIFIER-/370554411661?pt=Car_Amplifiers&hash=item5646c39a8d
Probabbly my least favorite of the three but Ibuilt a system for a buddy with 2 SA-12S and it did the trick