Just to clarify that Roin does not sell wheels directly to the USA. MrFiat.com is the exclusive distributor for their wheels in North America.
Ron,
If it's 15" Gp 4 wheels you're after, consider Marvic.
https://marvic.it/en/prodotto/pantera-gr4/
They are magnesium and the rears are 14" wide. Yes, they will ship direct to the USA.
The magnesium wheels are quite a bit more expensive and can also be purchased from MrFiat.com
Mr. Fiat does not stock either of these wheel brands, they simply drop ship to order. Marvic sells direct at lower prices and are wonderful people to deal with and the FX rate is very favorable currently.
MrFiat also sells the Marvic wheels and they will ship from Atlanta(not drop shipped). Once you consider shipping costs and import duties the price ends up being about the same.
Okay, thanks for the clarification David (Mr. Fiat), good to know there are options for those who want to deal with a domestic US based reseller.