Find a good used one at the salvage yard, chances are it will be the least expensive route. You might find that a salvage "B" pilar trim piece is starting to separate from the backer, but that is easily repaired using 3M adhesive and a little patience.
Same for the window sill piece, fine a good one at the bone yard.
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72
'02 CLK320 Cabriolet - wifey's mid-life crisis
2012 VW Jetta Sportwagon TDI...at least its a diesel
Non illegitemae carborundum.