I bought my F-Sport exhaust, intake and OEM spoiler from Sewell.
They ship through FedEx if you order from their site, but they can ship through the US post if you email them.
I saved the hassle and had them ship through FedEx (got the items within the week). IIRC, I bought the intake and spoiler at the same time and the total was about $800 (for both items and shipping).
Definitely recommend Sewell for OEM parts though.