I'm using Polymer Elastomer accelerator rolls from Flema. Spose to out last rubber by 3 times and priced about same as OEM. I can't find a web site, but call Mike at Precision Farm parts.
used stailess acc rollers for last 4 seasons or about 700 sep hours and yet to notice any significant wear. we dont grow many lupins but those i have harvested cracking doesnt seem to be a prob and is no worse in our cereals or oilseeds than rubber rollers. this is on a n6 here in NSW Aust.