Rover 200 & 400 Owners Club

I've bought a replacement rotor arm this week for my car, and it doesn't fit. I was supplied with Intermotor part number 47661S which cross-refs QH(?) P/No XR242. The bore is too small to fit over dizzy shaft due to it having a metal insert moulded in (also pinch-bolt hole is too small). I've been back to supplier and he confirms this is the part number against my vehicle reg on his computer - he's very helpful and is ordering another in case the wrong part is in the packet. I bought a dizzy cap at same time and correct one was supplied.

Can anyone offer any known correct P/N0's please?

NJE100071 according to rimmers #2
http://www.rimmerbros.co.uk/Item--i-GRID002303

Thanks for the reply. The extra one ordered was correct - the part numbers in my original post are correct - wrong part in box!
Andrew