I eventually chased up the Zymurgy with them, and got an immediate reply, and a copy in the mail a week later, (and then the same mag again a few weeks later !?!). They seem trustworthy, and certainly listen if you make a complaint, though I think we're at the mercy of long printing and shipping delays.
I'm giving them the benefit of the doubt for now, though we'll see what the next few months brings in the mail!