You are correct, found the seller in the Uk!
I asked Neil Blender about the Acs 430 pivot on Instagram, he just replied to me:
« Sure grip pivot inserts will work, the cheap ones black rubber. Sin City rollerskate shop in kernel Mesa should have some,if not try a dude on e bay w the handle skating2fast, ACS 430’s are pretty cool you may have to get axle sleeves that will convert those axles so reg 8 mm bearings will fit, that dude on eBay has some. They slip over the threads. »