I've decided to try to make some progress on my BN Business car set this winter, however my biggest hurdle is the lack of passenger core kits. I've got a decent stock of Kato coaches/sleepers I could also use, however I don't have any way of milling the sides down to allow the attachment of brass or styrene car sides. Same issue I'll have with my full dome and its replacement car side. Does anyone know of anyone who offers milling services? Or a source for core kits?