I know this is rather late but I have just found the ideal replacement part for the black edge strip that goes across the rear of the car above the rear lights (assuming you did not find a genuine Matra spare part)
A friend was putting new tiles on my bathroom wall and he used a plastic edge strip that is the same size and shape as the Bagheera trim piece.
The piece I purchased for trial purposes is made by:-
Homelux,
Airfield Industrial Estate,
Ashbourne,
Derbyshire,
DE8 1HA
Tel: 01335 347 300 (or +44 1335 347 300)
www.homelux.co.ukThe 9mm version is just the right size. Mine is black but I think they do Chrome and White as well.
The product is called "PVC Tiletrim" and is available from any tile shop or DIY store or Bricolage. Cost is "peanuts"
I shall be using it on Baggy Joe.
Andy Owler