Delrin is self lubricating and doesn't need to be greased.
Regarding the sway bar bushings, they help, but the improvement is very subtle.
Since you asked about availability and prices, I can send you a set of urethane swaybar bushings and brackets with the proper urethane grease for $14.95 front or rear. Call it $28.95 for the car set plus shipping. I'll post a picture Sunday so you can see what they look like. Let me know if I can help.