I have the Eibach Prokit available and could get the TEINs (from Japan) coilover system.
Pricing for the Eibach Prokit is: $240 + shipping
This product lists for $320.63 + shipping. I have it on my G35 as well and the ride is just as comfortable as stock. If you're not familiar with Eibach, just check out their website.....
www.eibach.com.
Email me at
[email protected] if you're interested in purchasing the Eibach Prokit or Tein Coilover system.
Best,
Wil