While searching EBay I noticed somebody had used this website to illustrate how rare their car was. So I did a search for Austin Metro and this was the result:
http://www.howmanyleft.co.uk/vehicle/austin_mini_metro
According to the results, there are 32 licensed cars on the road and 43 cars sorn.. ( hover your mouse at any point in time on the graph to see exact numbers.)
So I suggest that we mark 3 owners gather as many spares as you can store. They don't list Midas's
Just a point for discussion!
Alan