Audi RS2 brake conversion

Hello and Moin Moin, I’ve got a new project ashore again. And I want my Cope brake now conversions. I already have the Brembo saddles here for the 304 discs. Holders are steel flex lines and new ones. My problem is now the Brem discs. I already have some of ATE here but the hub bore is too big. I won’t get a 4×108 hole circle in there. I already phoned with Brembo in italy there it is also not possible to get a Brem disc blank. Do you know about other brake discs with smaller hub bores? And similar measurements? Otherwise, I just have the possibility to bring them back or? MFG