The bumper looks like what I would consider to be a fairly common rear bumper from when the truck was new. I've seen numerous ones like it on Broncos and pickups of the era.
The tire carrier looks well constructed but I think it's a one-off. Based on that bracket on the quarter panel, it appears to operate similarly to the old General Technology units which had an additional pivot behind the tire that allowed it to swivel and attach to the quarter panel fairly easily.
Todd Z.