Interesting thread this. Living this side of the pond, I often browse US websites - including Cabelas - with great interest to see what English guns are currently in your market and their quality, provenance and pricing. It is interesting to compare them to their UK-advertised counterparts.
I have considered at one time or another purchasing from the US and importing into the UK, more particularly a larger bore shotgun (8 gauge hammergun ideally, especially since I can use them in the UK). With this in mind, I am very interested to learn of peoples experiences of any well respected US(and otherwise!) gunsmiths/retailers, perhaps even some of whom may specialise in the larger bore waterfowling guns of old? I used to live in the US so the whole purchasing process etc is not necessarily an logistical challenge for me.