The front bumper is around the £420 inc VAT before any discount. That includes the red accents and other inserts, doesn't include NISMO badge or DRL. With discount, around £350.
http://www.the370z.com/exterior-interior/95060-2015-nismo-bumper-2009-sport-possible.html
Pretty sure toward the end of that thread there is a few pics of a early nismo with the new front end.