SS wheel charcoal paint Qs

[68bird400HO]

I am restoring a set of Pontiac rally wheels and am having a difficult time matching the charcoal color in the five inserts. The PPG Duracryl Lacquer part number is DDL-32947, however, I can't find any paint supply places that can mix it anymore. It is an odd color since it has a slight hint of blue to it. Here is the mixing formula:

Mixing formula:
Color Units (cumulative)
384 Yellow 20
311 White 44
321 Blue 74
358 Black 224
349 Poly 694
DX 265 Flat 984

First, I was wondering if anyone knows if this is the same PPG number used on the Chevy SS wheels for 1970-72 (or there abouts).

Second, if it is also the chevy color, has anyone found a close match to it off-the-shelf? I see that there is a chevy charcoal grey spray paint available from the vendors like D&R which is a Seymour product. Has anyone tried that?