I am not sure where you can get just parts for the Markland floorboards and pegs. New ones can still be purchased at several on line stores , actually they are copies of the originals but can be purchased.
EBay has lots of them in various forms, I suppose you would have to buy a like unit and just rob the piece you want.
Or what I do sometimes with a missing rubber section on a floorboard, (I have learned to take them all out, and glue them in with gorilla glue) is find an old rubber floor mat, a commercial one that is thick enough and just cut a piece and shape it to fit on a grinder on very slow speed. Polish it up on a cloth wheel. I have done that one before.
My Markland floor boards were both bad when I bought my Wing, but I had some rubber mats in my tool boxes that matchedthem perfectly.....I really didn't need a rubber mat in a couple of those tool box drawers, cut them to match what was left of old ones, some gorilla snot and Viola new rubber floor mats....While I had them off took my buffer wheel some jewelers rouge and polished them, they look like new floor boards......But finding this type of rubber might be fun, I think I bought these mats ( drawer liners is what they are called ) from my Snap- On tool guy years ago...They might still have it :baffled:??? Not real thick and has tiny grooves ????