Hi, this should be made up of 2 pieces of metal and not the one you have.
The parts are
(1) sloped kick plate
(2) sill/cill finisher.
- IMG_20191114_172657.jpg (991.59 KiB) Viewed 4985 times
The shiny part is the original aluminium kick plate, the black part is the finisher, which would be body coloured.
Now for what my passenger side kick plate looked like when I last removed it
Outer view -
- IMAG1458.jpg (728.88 KiB) Viewed 4985 times
Inner view -
- IMAG1459.jpg (836.1 KiB) Viewed 4985 times
You can see the erosion around the holes.
I have received my new alloy ones from Andy Eggleton and they are very good. The bolt holes have been made elliptical to accommodate any fitting variation. The fold-over part has been pre-drill, but some kick plates don't have any holes and just sit down on the carpeted edge.
I've compared the new aluminium alloy ones with some spare steel ones I bought a while ago and the shape, size and curve marry up very well (except the new ones are so much lighter).
'50 Low-light with 918 Side-valve engine,
'51 High-light with Side-valve 918 engine,
'55 4-dr with 803 engine,
'56 Traveller with 1098 engine.