Get some used JDM wheels, not cheese-o-poop ADR rice-tabulous 18-inchers.
Oh, and 18's look just peachy on S14's and 15's, they just tend to look a tad odd on S13's.
Anyway, try ebay for used Japanese wheels, just search for "JDM, wheels", then sort by price, highest to lowest (to filter out the steering wheels).
Also, try RBMotoring's site, they have a bazillion wheels for sale.
EDIT:
Here you go, uber-JDM-tizyte Kei Office Modia wheels, perfect fitment, with tires, for $475 Buy-It-Now. Buy them or suck.
http://cgi.ebay.com/ebaymotors...QrdZ1
Edit AGAIN (just because I'm such a f**king nice guy)....
Get these if you wanna go SUPER cheap and just be cooler than everyone with your overseas stock-ness. Yes, theyr'e stock 180sx rims, and yes, they're mind-numbingly inexpensive. Buy them and powdercoat them bronze, and spend the extra money on NICE meaty tires.
http://cgi.ebay.com/ebaymotors...QrdZ1
Modified by HashiriyaS14 at 9:28 PM 9/27/2005