the bushings are called Igus bushings after the hybrid plastic they are made from.
and the damn things are expensive !
I think I paid $60 for a full top/bottom set for both sides when I bought them 2-3 years ago.
BTW...I tried to avoid buying them, and tried 2 different homemade bushings, hard rubber hose and white delron, both only lasted 1 ride.
best to just bite the bullet and buy them from works