vfrdude: rubber != polygraphite or polyurethane. All he can find is rubber....
Yes, Energy Suspensions (either through Summit Racing or others) has polygraphite/polyurethane sway bar bushings, but only for specific sizes. I had to go with greasable ones for my 1 1/16" sway bar. It's cool that they have tie rod boots, and control arm bushings.....but what about ball joint boots???? That's what I've had a hard time finding.
I've also heard to stay away from the cab mounts, unless you've gotten a cab support kit to go with it. Stock ones get messed up!
Performance Suspension Technology (
www.p-s-t.com) hints that they do, but once you manage to get a salesman to set up an order he usually goes "oops! We don't have them...sorry dude". That tells me they used to carry them but not any more. They don't have manufacturing information either, so you can't go searching other places...
Good luck.