Depends on how soon you want it. Fibrevision are quite expensive even for knock off's, but there are other companies over east that are half the price but take about 2-4 weeks to land once ordered.
If you want to check them out, try
THIS MOB. Both Brett and I have purchased from here before and they are quite good. I have the setting as a series 1 R33 but you can change it in the drop down boxes if yours is a 1.5 or 2. Compare these prices to Fibrevision and you'll see what I mean.
Another option would be to try someone like JPC. Brett purchased his bodykit from them but has yet to fit all of the pieces which is happening soon. Even though they are used, if they're in good condition it'll work out cheaper.