I have a seized piston on my RR caliper. Looking at rebuilt parts on the web. A mercedes mechanic told me the vehicle has "European" suspension as the calipers are located towards the front side of the vehicle. ie. the caliper on the right rear is situated on the right side of the disc. Am I in need of a certain brand of caliper?

Total bummer as I planned to be back up and running in my 87 560 sel today. Classic case of a simple job of pads an rotors getting much more complex.