If the caliper is identical in every way other than bolt hole size you can also just drill out the holes in the caliper to match the old one. I had to do that on a rebuilt rear caliper I got for my Disco. No idea what year it was for, but it was the same as the original other than bolt hole size.
But yeah, RN should have known, provide you gave them correct info.
Four wheel drive allows you to get stuck
in places even more inaccessible.
62 88 reg
67 NADA x2
74 Lightweight - The Antichrist (tag 6A666)
95 D1 - R380
95 D90 - R380
97 D1 - ZF