AFAICT here in the UK there was a very limited first week release, followed by a restock and since then it's not been an issue.
I am genuinely interested in whether miners are really buying these. Have you any reason to think they are?
I couldn't find much when I looked, beyond speculation about how amazing they might be (but turned out not to be). AFAICT for ethereum you're better off with nVidia 1070s which can cost about 75% as much, have about 75% of the hash rate, and use under 50% of the power.
