I called many salvage yards around here, even a big truck yard. No one seems to have those older trucks around anymore. A lot of junkyards scrapped EVERYTHING back when the price of scrap was way up about 10 years ago. It was pretty crazy to see huge empty sandlots where used to be 20-40 acres of vehicles previously. There have to be some around somewhere though I imagine, I may just have to expand my search to different states maybe.
https://www.heywheel.com/page11.html