Nope, just ebay. Does it say "seller is away"? They might be off for the weekend. They tend to take everything off sale til they're back. It'll give u a date somewhere. If it's not that, i ain't got a clue!
Their shop looks normal to me, the only time something has come up unavailable it was when i put it in my basket and didn't order straight away, just had to to click onto the item again. They now have a fb page https://www.facebook.com/progressive.earth?fref=ts