Are you saying you can’t find rotors to fit? I replaced pads and rotors in June on My SRT Roadster. Rob at Needswings got me EBC slotted rotors and ceramic pads. I can’t tell you part numbers anymore but the rotors came boxed in pairs so you could get fronts only. I think he also sells stop tech. Give him a call. I surely would not use adaptors and definitely would not try to drill them. Brakes are a pretty important component.