Thanks for comments, guys

I've had a quote on a replacement hood for about £400, so not too bad. All I know about the car from previous owner (MG Chairman) was that it was one of 12 made to distribute around the main Rover dealers in Britain. This was to see what interest would be had to make it as a production model.
I thought "Rapport" of Abingdon did the conversion as I have a brochure of one which looks virtually the same conversion.Then someone emailed me and said it wasn't. Apparantly they had replaced the front wings on it, and had worked for Rapport in the 1980's.
I've also had a previous owner contact me through YouTube. They gave me a little history but nothing about its origins. They sold it because they were moving to Canada and asked if they could buy it back. I said no, because I intend to keep it forever at any cost. Possibly being the only one in the whole world I feel a great responsibility to preserve it.
Suck, Squeeze, Bang, Blow.....
1987 MG Metro Turbo Convertible (Diamond White)
1988 MG Metro Turbo (Stone Grey)
1990 Metro Advantage (BRG)
1993 Metro GTi mpi (Flame Red)