Hi Russ and welcome,
The marche pied (foot plates) are not cheap.
Here is a link for a pair of secondhand ones :
https://www.leboncoin.fr/equipement_aut ... tm?ca=12_sNot the usual 'Robri' brand but 'EB' . . . . . . no idea what the difference is.
I use this French site quite often for spares and I can only do that with the aid of google translate as I don't speak francais
tip : When using it I start off by making my excuses for any grammatical errors and pointing out that I am using a bot translator as I don't speak the recipients language . . . . . . and it works every time !
Worst case you could fit a piece of ( traanplaat) aluminium checkerplate instead.
I have the opposite problem, good aluminium footplates but the underlying steel is shot, but it can be patched up.
Good luck,
Pete