I'm also not a fan of urethane either, but if I had to settle for it, I'd go with J&M fixed rear lower control arms. Although their bushings are urethane, they have a unique design that includes a plastic ball that gets inserted into the urethane bushing. According to J&M, once the included marine grease that comes with the kit is applied to the bushings, they don't ever require re-greasing as their self-lubricating. The only downside IMO, is you have to assemble the bushing components yourself, so if you have any doubts when it comes to assembling bushing components, then I would advise against the J&M control arm kit. However, on the plus side, J&M does back their bushings with a lifetime warranty. At any rate, just another option that might be worth considering as well
https://www.americanmuscle.com/j-m-rear-lower-control-arms-red-0514.html