To be honest, I don't order from the USA now - I gave up trying to find a reasonable supplier a while ago. The Royal Mail charges were very hit and miss - sometimes I would get charged, sometimes not. There is very little now that I cannot source in the UK. It is more expensive per metre/yard, but offset against the costs of shipping it all evens out.
My daughter lives in PA now, and although not a quilter herself, will always get me anything I need from local quilting shops, then either bring it over when she visits, or sends through the mail. In my experience most quilting/fabric shops in the US don't want to be bothered with sending anywhere outside the US/Canada. Very occasionally I will buy from US ebay traders - if the postage is reasonable ($50 to send a small parcel of 3 FQ to the UK is NOT reasonable). This is usually for hard to find, or end of manufacture prints (such as the Beatles prints).