I didn't know such a color existed but I bet someone here would love these... I have met the seller good guy Probably good for 67-70 or 67-69 https://boston.craigslist.org/bmw/pts/d/buick-nos-mats-gs-electra/6282054403.html
The interior of my car is close to that maroon. It's why I had the roof made in the color it is now; so it'd all go together nicely.