Need help replacing a lighter for a 91 bronco

If your local dealer does not carry it - or cannot get it, then call local salvage yards for one.

Hi,
A local junk yard is a good idea, as mentioned, if an Auto Parts Store doesn't have a new one.
They are fairly easy to take out of the dash, connecting the wires the same way, and putting in the "new" one.
Best of luck.