Who here has used a Powertrain Technology hydraulic throwout bearing?

RBConvert said
I have a Keisler Engineering hyd TO bearing in the Dart (over 10 years old). When Keisler went belly up several years ago, two companies were born: Powertrain Technology and Silver Sport Transmissions. I can't comment on Powertrain because I've never contacted them, but SST was very helpful when I called. The Tremec wouldn't go into gear and I thought it was the TO bearing. Talking to their tech staff at length, turned out the master cyl at the firewall needed rebuilding. Cost me $60 instead over $300. And BTW, love the hyd TO bearing; easy to shift, positive engagement. Even with the high-winding 360, my wife can shift with ease.
TREMEC 5-Speed and 6-Speed Kits: Silver Sport Transmissions

RBConvert, it's funny you mention Keisler, i actually have that setup here, but when i went to screw in the fluid line into the TO housing, i damaged the thread and it kept leaking, so i started looking for another one and found out they don't make them anymore. I also spoke to Silver Sport Transmissions, but they could't help me as they no longer have them, and don't have a replacement, so if you or anyone else knows where i can get a Keisler one that would be great, or something that will work in it's place.
Happy to buy a Powertrain Technology one too but as i said they didn't seem to excited about helping me out.