I use a Teflon grease from Huskey called Lube-"O"-Seal on all of my bushings. This is the same sticky stuff that comes with poly bushing sets, but its only a few dollars for a standard grease gun cartridge full of it. I do have poly everywhere so I don't know how well it works with plain ol' rubber. Can't hurt to try!
You could always just switch to greasable poly bushings. I actually have a spare set of front and rear greasable swaybar bushings for an 88 as I ordered two sets by accident. PM me if you're interested.