No those weren't offered on F bodies but they will fit fine and should look good.
The only 15" wheels from the factory on F bodies were on the cop cars, the Super Coupes and the Kit Cars.
May just put the cop wheels on the Duster,
and the 10 spoke on the Diplomat Coupe.
The paint looks like it could buff out.
So I'm thinking of a Black and Tan look for now.
Satin Black Cop wheels, window and wheel flares, front and rear spoilers.
and dye/paint the faded interior pieces black.
First up is the V8 Swap.
As I'm pulling the 318 and trans out of the 87 Diplomat,
the excellent front clip will be going on the Diplomat Coupe.
Before I can do that, I will be dropping the V8 K-Frame from the 85 Dip with no engine.
Clean and paint install new ball joints, tie rods and bushings while its out.
I even have a new set of 10"rotors that could go on the new front end.
I bought them for my Lebaron then upgraded to 11.75s and never used the 10s.