The MEC had stock, which they sourced from me. Cannot say for the MOC but they might have sourced from Pete, who sourced from me. I was the one who broke up some 300 unwanted light units bought in error by a non disclosed source. I had the rivets, but as they were used (so weakly they would go again) that the retail outlets did not want them. Demand was such that I sold out in 18 months!
With respects to remaking this part, and many others. Without being rude, your thinking exposes the error made by many clubs. They do not trouble to look at what other vehicles, and therefore potential buyers, might wish to buy the same stock. (It might be they have stock to spare). In this case many Microcars, Motorcycles, Mopeds and Commercial combos use this same light, so the market is actually pretty big. That is why if you go to Mannheim you will find these lenses for sale from specialists. The trick is to know where they source them from to get them at a good price. Its not in the specialists interest to tell you that information as the loose profitability. A mutual (real) club would know this information and either have stock or direct you to the best and most accessible stock outside the club. Why the secret? If I know all this so do a lot of other people. Kerching not club, as nice as the folk within it might be. (Known Wynford for years and many a foreign rally together)