Cant think of any Nismo part that does not carry the name somewhere on it.
Ok - well yes for the pedantic - its not actually a Nismo part, its a part of the Nismo car. Just like the "Nismo" side skirts on the 350z. I'm not sure they are acutally made by Nismo, its just the styling from the Nismo car
Couldn't you have painted your own cover for less than £240?
Probably if I had the skill, motivation, time (to find the right combo of paints, do the research, do the rubbing down, flattening, re-spraying), dust free environment and a garage that still has a workable door (mrs broke that as well as my Honda lawnmower on the same day!!), I reckon it would have taken me all summer , as it is it took 3 minutes