Look into hifonics. Plenty of 1 ohm amps that will give you the power you need.
http://www.woofersetc.com/index.cfm?fuseaction=product.display&Product_ID=6640
http://www.woofersetc.com/index.cfm?fuseaction=product.display&Product_ID=5674
http://www.woofersetc.com/index.cfm?fuseaction=product.display&Product_ID=6639
http://www.woofersetc.com/index.cfm?fuseaction=product.display&Product_ID=7502
http://www.woofersetc.com/index.cfm?fuseaction=product.display&Product_ID=6640
http://www.woofersetc.com/index.cfm?fuseaction=product.display&Product_ID=5674
http://www.woofersetc.com/index.cfm?fuseaction=product.display&Product_ID=6639
http://www.woofersetc.com/index.cfm?fuseaction=product.display&Product_ID=7502