Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Robynsaddiction-at-aol-dot-com>
Hey John,
       My driver used an IRF 540, 640, or 840. The driver that I'm using came 
from Justin and Aron at www.HVGUY-dot-com, and it works very well. Hope that 
helps some.
       
                                                 Richard Harris