If you’re referring to the glass lenses. You will be hard pressed to find them for “cheap”.
When I was looking into them a few years ago. Most importers wanted about $590~ish for the pair. That was in US funds before shipping. It was cheaper for me to buy JDM Kouki headlights…
And you obviously didn’t search google…
“S14 Zenki Euro Headlights”
Second result…
http://topendmotorsports.com/jp/exterior/lighting/headlights/finalkonnexion/index.html
“S14 Zenki Glass headlights”
And this was in the the 3 results…
http://www.jspec.com/s14zenchas.html
No more spoon feeding…