fallschirmjaeger,
I suggest you carefully study the catalogs of " Ernst Apel Wuerzburg" (EAW) and "Eric Recknagel" (ERA) to find the parts you need. Both of these firms have Websites and have the parts. There are so many choices of ring diameters and heights that it takes either a lot of study or experience to get the right parts. The front ring will come with the foot plate( fuss platten) already fit to it. The plate already on the rifle drifts out from left to right. The single lug on the rear foot is easier to fit than the more common( different type guns) double ones. It would be very helpful if you could closely study a rifle with scope already mounted.
Good Luck,
Mike