how many rouse sport 302-r's were made? and how many are left on the road?

I thought that is it was 6 but I was chatting to one of the bufty's at National day who had a concourse 302-r and he reckoned that only 5 were made

and that they were numbered 1 -5 but mine is number 9

slightly confused

also my car was made in 1989 but the rouse plate says 1992