Some good news and some bad news.
Good news is I have a New Old Stock set of wide factory flares with metal backing strips in original box.
Bad news is one of the flares is missing.
Let me know if they are of any interest and you can have them for what they owe me - $230 plus postage.
Pictures on the second page of this thread -
viewtopic.php?f=2&t=88746You may have more luck finding a single flare on this forum or from one of the Mini businesses (e.g. Matt Read) rather than a full set. I haven't tried. Also, John Smidt may be able to supply a single fibreglass flare to hold you over while you search for an original plastic one.
Update: RHF is the missing one.