Looks pretty much custom made...This set up looks great ! ADVAN / GALLERY / ADVAN MATCHING GALLERY / NISSAN SKYLINE GT-R [BNR32] 1991y
To my eye it looks like Do-Luck with the centre section painted black/carbon.Looks pretty much custom made...
...bumper itself seems to be the Do Luck one.
Personal opinion, I happen to like the look of my Abflug Diffuser on my R32, might pay for you to include "IMO" when you make statements like that.....Diffusers generally look horrible on the R32,
Funnily enough, the way a diffuser works you benefit from having a high bumper, that's why you see Time Attack and DTM etc cars with the diffusers cut into the bumpers.this is mainly because the bumper is very high and when looked from the side it is not consealed as it is on an R34 or even an R322 for that matter.