Which hydraulic throwout bearing?

Hi there.

Last year I installed a hydraulic clutch assembly into my '65 Barracuda that has an A833-OD gearbox. I've fiddled and fiddled with the pull-type slave cylinder and varying clutch forks, but I just can't get enough throw to disengage. I'm using a Wilwood 7/8" bore master cylinder. The clutch is a nice Centerforce diaphragm unit. I've decided to quit messing with the slave cylinder and just go with a hydraulic throwout bearing. Can anyone point to exactly which manufacturer/model/part number I should be looking for? I've seen the McLeod unit, but $465 is a bit steep.

Thanks,
Marcus