Does anyone make a drop bumper for our trucks?

[Mattchu60]

Been looking on the internet for some time and I cant seem to find any companies that make drop bumpers that will fit our trucks. I see pictures of our trucks with them, so they must have been produced at some time.

Luverne makes drop bumpers, but the brackets are no longer made. I searched hoping to find some used ones but no luck. Not sure I could fab up my own or how hard it would be.

Anyone know of if someone still makes drop bumpers for the 73-87? I have an 87 model myself.