It was Viva outer sill, I forget which version but it will be the round one which I think was the HB, which has a flange at the bottom to butt onto the flange on the new floor.... if it has one! The curve round is not compound but a rolled curve of near correct and adjustable match to the Trienkel. Clearly the panel can only go up so far before some adaption is needed to take in the compound curve of the Trienkel shell in. The first car that I knew to have used this method had a Vauxhall bonnet as a main floor and a Chevane spare wheel cover as front floor, suprisingly close with swages and thick guage steel, so we are going back a bit. However it was about as accurate as the first floorpans the HTOEC made available and better metal! All you needed to finish the job was a HTOEC dustbin lid for the spare wheel well!
The Viva panel is a close match and in the absence of any genuine replacement panel does very nicely. Nearest place to you, Adi, is LBC Panels of Westbury, if they are still going. As soon as you have sight you can see it will do the job. Failing that there is guy from the midlands who does mail order sill out of Classic mags like Classic Car Monthly the autojumbler paper. Trouble is you will not see what you might want to buy.
