I tried using the NAS lights as well - picked them up cheap from GBS at Detling, but found they fouled on the rear tyres inside the arches.
I fitted these instead:
http://www.s-v-c.co.uk/prod/JK_Crystalights.html
E marked, not very expensive and better looking than the NAS lights IMHO (and a load cheaper then a very similar product offered by CBS)