If you're wanting replacement reflectors that are in fact lighted, but stay in the stock locations low on the fenders, I don't think such a part exists.
I've thought it was a great idea for a new product for a few years now, because I'm a huge fan of the lights and think they make the vehicle they're on look better at night. But I'd like something that mounted in the same fashion as the stock reflectors.
If that's what you meant, you might have to be the one to make them!
Then again, I have not checked into this part on the old pickup truck forums. Maybe there is someone out there doing it and we can use them on Broncos?
Paul