Briley gets our rubbish, 'cos we like to keep the good ones! Due to various economic and social cirumstances there are some wonderful English guns in Australia, but they are generally tightly held, not horse traded willy-nilly! (I can expand if you like; it actually is a fascinating study). Many of the old English guns in collectors' hands in North America now are, I suspect, of Australian provenenance. It might be a beater, but I bet it's got a fascinating story to tell.
I have emailed Alex; guns are routinely sent from Australia by a couple of dealers; it's just the stateside end which needs worrying about.
RG