I do not think I ever stumbled across the correct colors. The problem stems from the fact that multiple shades of green are used in these cars (the upholstery, the door panels, the plastic panels, and the dash are all different shades) and that my car wasn't original when I bought it (the upholstery and dash had been changed). All of the original cars I've seen have been so old and rotted that you really can't tell what the correct color is supposed to be. Here's what I did, and what I can tell you.
Ditzler 44173 is the correct color code for the "hard" parts in the car. A-pillar covers, rear window lower steel trim, etc. It's a perfect match, as far as I can see and I'm very happy with the color.
OER M24 Dark Green interior dye is a match for the silvery-metallic seat upholstery that you can get for these cars. If you look at the attached photo you'll see that this dye (the center portion of the C-pillar cover is dyed, which should be obvious) is a very good match for the upholstery kit that's available. Note that there may be more than one dark green upholstery kit for 1970 cars. I'm not sure and really don't remember since I bought mine over a year ago.
I used another paint, SEM C-VP5084 Dark Midnight Green Metallic, on my dashpad. It's supposed to be for a 1969 Camaro, but it's about the only other dark green vinyl I could find that I thought would be even remotely close. It's much darker than the color of my vinyl door panels or my hard plastic interior parts (both of which are pretty close in color). I wound up using it on the dash anyway, because I *needed* to re-dye my dash and couldn't find what I thought was the right color. The following photo shows one of my door panels compared to the re-dyed dash. You can easily see how much darker the dash is.
In the end, I was unable to find a vinyl dye of the correct color. I suspect that the only way anyone will get it is to have something custom mixed using a hidden, non-faded portion of interior trim as a source color. I'm good friends with a painter and he was not able to do this for me, so I'm not even sure how a person would go about having a custom dye made. I'm going to wind up just making my plastic pieces look as good as possible and buy replacement door panels that are hopefully the right color. I figure that's the best I can really do for now.