Sam, I have done some minor research on this idea, and have binned it for good. The approximate all up cost of doing this on a 4 dr W124 is between $850 and $1500 depending on where you get the panels and the retainer clips. I would suggest getting the grey plastic bumper shrouds painted the same color as the rest of the car. It can have a pleasing effect on how it looks. The late model body cladding looks nice, but I'd rather find something more important to spend that kind of $$$ on.. Just my $0.02

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Jeff Lawrence
1989 300e
2000 Dodge Grand Caravan SE