Just back from collecting my second TDI 90 (the black one!)
Up on miles (152k) and what I would describe as a genuine car! Needs some cosmetic TLC but mechanically very tight and drives well. Nice spec, sport, cream (i believe ) leather and alcantara, rear bench seat, front fogs.
I suspect you are right, option code is N7U which I believe is pearl nappa alcantara mix so quite rare too. Looks nice with the black, will look even better once cleaned up.