Originally Posted by OptionZero

Varis
Amuse
Zele
Fujimura
AIMGAIN
Veilside
Ings+1

those are the most well known JDM companies that make complete aero sets. There's a few smaller companies that make some components (Voltex, Top Secret) They're most likely to have the best fitment and cost the most, with a long wait time. NextLevelPerformance or SpeedImageUSA can get you this stuff if you're willing to pay to play

Stillen is a domestic manufacturer. Highly functional but proven, terrible fitment. They sell on their own or through Z1

Carbon Signal makes individual components and fenders. Mostly good fitment, high price, terrible communication, long wait times (shipping from middle east). Good luck ordering

VIS, Fly1 and Seibon are stateside companies that make knockoff designs that are very common. You can get these basically anywhere, including direct from them

Then there's Duraflex and the ebay quality brands that you're gonna need to chop to fit. You can get these at the dumpster

lastly, Nismo components. You can buy new from Nissan or Z1 or any place with a Nissan account. You can buy used from junkyards, ebay, craiglist, or this forum