Line 7 of the build sheet shows these as option G36 "Painted Racing Mirrors" classic industries have these in stock https://www.classicindustries.com/product/1970/plymouth/cuda/parts/ME1644.html
Cool !! I'm just outside of Searcy, maybe we will meet up at a show sometime. I saw another 70 cuda at a show a month ago, it was a highly modified 318 that had a newer hemi in it Dont remember where he was from, Batesville i think ?
You could consider a Borgeson steering box upgrade instead, they steer like a modern car, i love mine Home - Bergman Auto Craft - Home of Quality Muscle Car Parts