Ok, seeing no response from the Carradice folks, I have investigated two more sources: SJSCycles and BikePlus, both in the UK. SJS Cycles charges 25 British pounds for shipping; I have placed an order for the Barley and a Bagman QR Sport with Bike+, and I'm waiting for an estimate of the shipping fees. Depending on how much duty I have to pay when the package arrive, this should come in at a reasonable price.

I might get the Lowsaddle longflap later, but for now I think the Barley will probably be big enough... It can carry a bottle of wine.

There's a really cool Carradice group on Flickr, for those interested...

Thanks all! I will keep you posted with pictures and everything when it comes.