(ET) motor for pump?

[Steve Gaarder <gaarder ecovillage ithaca ny us>]

This is off-topic, but I figure this is a good place to ask about electric 
motors.  I need a motor to drive a water pump from a PV system with a 
48-volt battery.  I'm thinking that an ET drive motor, or something 
similar, would be a good choice.  Are these available (without sacrificing 
a tractor)?  What RPM would they spin at at 48 volts?  Could they put out 
3 HP continuously without overheating?

thanks,

Steve Gaarder