That makes sense, I understand that Magpul must be spending a lot of money making 2 types of magazine - especially since one is (for all intents and purposes) useless, if the real-steal version can only be used by a small part of the market.
(Off topic, on to gun-ownership)
I do know of a very small number people in the UK who own real-steal SA80s, all are A1 types, although this is going back at least 3 years. I can't remember if they had been converted to fire a different ammunition. I'm not an armourer, so I don't know the details - but - they'd been modified so that they could only work on semi-automatic. One of the L85s was clearly a former cadet rifle, as it was bolt-action only (or whatever the correct terminology is for an assault-rifle which only fires by manually pulling the charging handle)
Cost a bomb, I remember the guy owning the LSW told me it had cost him about £9K, without the SUSAT.
You can/could buy 'cloned' L85s in the States, made by a group called Prexis. PR85s. Based on the A1. I have no idea if this is still possible, nor do I know how successful this company was. I'd also been told of a group (LE International, I think, based in Southern England) who sold .22 'clone' L85A1s to the European market.