For sale, the above wheels - I bought them for the BX, but I've decided I like the 205 1.9 alloys more.
They are the ones above, with three matching tyres and one that is different. All are 195/50/R15. One is inflated and three are flat, but I don't know if they would hold air - they haven't been on a car for ages apparently. All have decent tread. I'll inflate them soon and find out...
One has curbing and one has serious lacquer corrosion, but a wire brush on a drill and a sand/paint respectively would clean them up.
I thought one of the 16v boys said they would fit, but I can't find the blasted post now! Will keep looking. STILL haven't managed to try inflating them. Housemate has now returned with the foot pump so if needs be I'll do it the hard way!
I have a strong feeling that a set of genuine BX 16v alloys, freshly painted in dark grey, and fitted with 4 almost-new rubbers, will be coming in my direction very soon!