I know I'm late to the party but this was an exact match to the dark saddle on my '73 SD survivor car and my 1975 Gramma's car (Esprit). I got it from NPD.
https://www.npdlink.com/product/inte...ray-can/122745
SEM custom mixed C-VP5855 for 71-72 Camaro. I have no idea why they had it primarily listed under a Camaro application which it is wrong for, but it is perfect for the 73 Firebird. I used it for the inside door strap pull caps when I had to replace them on my 75.