Damage looks superficial, but id look closer at suspension at chassis.
You have GTR panels all round dont cya?
I can tell you right now brand new OEM front GTR fender(1) is about $800, bumper $600, lower bumper lip $400, if bought new from Nissan, and you'll have to wait... I know this because my 'R got ute spec'd, but his insurance is covering it, lucky for me (sorry!), but the waiting game begins.
These panels can be difficult to source second hand, but defiantly worth looking.
If it was me in your position, Id be looking at the Bee*R R324 conversion kits.