Reasonably sure the NX is the same as the XL up to the advent of twin front discs on the TA. Both NX and XL have the same speedo gearbox too - again, up to the twin disc XL models. I looked at the similarities a while back and I'm near certain the NX front 21" is exactly the same as the single disc XL600V right up to the last NX models. Not sure about the rear 17". That obviously depends on whether you need the rear to have a disc or a drum - both were fitted to the NX and XL.
Alternatively we have an excellent wheel builder here in Pompey (assuming he's still alive that is), but that would mean entering enemy terretory for you! I can't stand football, but those that do like it around my way seem to prefer the colour blue to red for some reason...
P.S. I'm a refugee that went to school in Chandlers Ford, but don't tell anyone!
Tall men see everyone else's bald patch but their own.......