Rear side windows apparently. I've asked for a set but they need to make more so I'm still waiting to hear. Hoping they do the job.
They have been NLA for ages and other rubber co have said it wasn't wroth paying for the tooling.
Like a lot of RRC body parts sadly. I have seen posts describing how some folks have managed to rejuvenate seals by cutting away the worst areas & adding material, so might be worth another search.