Additional hitch and spare tire mount.
I started with this curt universal hitch.
I flipped the Curt hitch sides so that the flange was on the bottom.
I then cut the hitch to the width of the inter frame rail approximately 33-1/2 “
Took the cut off pieces from each side and made them the other two receivers.
See attached drawing for dims ... Make sure you drill the 5/8” hitch holes before you weld the two cut offs.
You will need to allow space so that the side pieces slide in to fit between the truck frame when you install it.
I bolted the sides to the bumper holes total of 4 grade 5 bolts on each side.
I also re-drilled the bottom holes in the new hitch to match the existing. Replaced all the hitch bolts with 1/2” longer grade 8 bolts.
I cut the bumper hole with a jigsaw with a metal blade. It took a little time but was a clean cut.
Hope this helps let me know if you need anything else.