i found this link today. dont know the guy but i do know woody and some others were looking for just such a setup

Polyurethane Bushes for many models Group buy - Benzworld.org - Mercedes-Benz Discussion Forum

 

I think its crazy there aren't poly suspension kits available for crossfires... I purchased an old 98 neon for cheap work transportation and i noticed the control arm bushing needed replaced badly. when i looked online for a poly replacment they make entire kits for the darn thing i mean ever single rubber suspension component.

Last time i checked Energysuspension.com they didn't have poly sets, i haven't looked at the Prothane.com yet though.

 

I just looked up prothane.com and they dont list anything for the Crossfire or MB version......

 

isn't the k-mac camber kit basically an eccentric polyurethane bushing kit?

 

I have found this poly suspension on prothane.com. They already have this one. Last time i checked that was almost $50 if my memory is correct.