It’s from the same source that Frazzle bought his Ebay shirt from. They make branded fakes of popular 80s/90s shirts which I suspect are made in the far east. However, they are run by genuine UK shirt geeks. They even put branded labels on the collars. I’m surprised that adidas, Umbro etc have not tried to stop them from manufacturing these shirts. Especially as they make 80s retro from big clubs like Man Utd, Bayern Munich, Napoli. They even sell fake Man Utd 80s adidas tracksuit tops. I suspect, it’s only a matter of time before they appear on one of these rogue trader type shows.
Due to my design OCD I messaged the guy on Twitter and asked him to tweak the adidas logo on the shirt. Ours had just one ® symbol above the adidas lettering. I have ordered one so I look forward to seeing the quality.