A few years ago, I searched around for some light weight wheels for a different car. Best "bang for the buck" I found were the Konig heliums. 15x6.5 wheel is 11.4 lbs, you can usually find a set on e-bay for ~380 plus S&H. Unfortunately I don't think they make a 14".
The Volk wheels are sweet but expensive, and 10 sets for the whole US?? those probably wont be cheap either.
This is a database of wheel weights:
Some fairly accurate numbers. Also beware that some MFR's make a cast version of the light weight forged wheel...if you buy from an individual they may try and pass the cast off as forged, or simply not know the difference. IIRC, "buddy club" was one wheel MFR that did that.