Alright guys (and girls) I thought I would request the help of Oppo to help me track down this rare poster. White Post Restorations is the company listed on the bottom of the poster and I have even managed to contact them but alas they informed they no longer have copies available. I recently tracked down a copy for sale on Etsy but after purchasing it the seller contacted me to say that regrettably he can no longer find it and issued me a refund. My image is from the Montana Auto Museum in Deer Lodge, Montana. Highly recommend visiting it if you are in the area. No seriously go check it out. It’d be awesome to find a copy and have White Post (or someone else) start reproducing it.
Here is a link to another copy.