You said not imported stuff but here's a little list of some things that I think make the car look great and still stock:
power folding mirrors
nismo grille
lucino bumper
Parts available here:
Front and rear mud flaps ( not necessarily rare, but look nice)
Armrest like mentioned earlier ( if you can find the B14 one, go for it, but if you cant, the g20 armrests also work, with a little modification)
I'd always be on the look out for clean visors ( ours get destroyed rather easy :/ )
If you can find a honeycomb grille, a lot of people prefer that look over the 95-97 style grille
Same with the 98 style bumper, people like it because of the option of blacking out the lower portion of the bumper.
There's also a difference between taillights , non bubble and bubble, the bubbles come off a 98.