I have always had good luck with a good "moly" based suspension lube. I think it is still available in tubes at NAPA stores. Both in regular tubes and also tubes for lube guns.
I have never had moly hurt rubber or plastic bushings and has a great consistency for staying in the "friction zones".
I would almost bet money that "dake's" Dry Lube had some moly in it.
2000 Dutch Star 3859 DP (Spartan)
Flat towing a 2015 Chrysler T&C
Canby, Oregon / Riceville, Tennessee