I agree, some wires must've gotten crossed. I just ordered mine and each size is still available. Beyond it being a very stupid idea they would've been easily sold out by now.I've only seen it on here. And with no offence meant to anyone who's repeated this information, I just don't believe it.
It's currently being sold here in Puma's stores, so I imagine it's being sold in stores all around the world. Plus it's available in City's own stores, plus mancity.com and puma.com.
They'll be selling loads more than 3,000. It would be a terrible business decision to restrict themselves to such a small number.