Any rubber bushing options for sway-away spring plates??

[scottrx7tt]

Ok, so I'm at the end of my rope with the poly bushings that came with my sway-away adjustable spring plates! They do nothing but squeak, and creak. I have tried every kind of grease I could think of. My last resort was the energy suspension poly grease they sell, but nothing will stop the creaking. It's embarrassing to go cruising through a parking lot and hit a speed bump, and have that creaking! It sounds like I'm rolling up in a crappy old 72 impala or something! I know elephant has the poly bronze bushings, but is there anything else out there as far as stock rubber bushings for these?
You Sway-away users, what have you used? Please help!