I suggested they offer the option to ship Royal Mail to let their US customers try to duck the customs and got this response: "Thank you for your reply. We understand that this matter is frustrating. It is also for us as we are aware it will affect our business either way. We are looking into the issue in full to come to some resolve as soon as possible. We can certainly ship with Royal Mail. If you wished to place a new future order please email with your order number once the order is placed and we will then ship with Royal Mail." For those interested, it would be worth trying, as I have never been charged customs in the RM to USPS transfer.