I posted a thread on car-parts trying to find.
7000 salvage yards and no dice.
1st gen Dakota

 

What bolt pattern do you have? If it's 5 on 4 1/2, you can use car wheels if they have the same back spacing. Just make sure they are the big bolt pattern. Some of the cars with 13 inch wheels back in the 60's used 14 inch wheels but have a 5 on 4 inch pattern.

 

First...do you want 6x or 5x bolt pattern? Trucks before 91 had the 5x bolt pattern and finding a 14" in that would be easier. The 6x bolt pattern the Dakota never used anything smaller than 15" so that would be a problem.

Did you try car-part dot com? I just checked and they seem to have a bunch.

I'm unclear why you would want 14" vs 15" wheels? Tires for 14" wheels are getting harder to find IMO.

Steve