Another 1967 interior paint question (green)

[JQ-72]

So I got the Ditzler interior paint code for 67 and carried it to my local O'Reilly's auto and talked to a guy who was referred to me as a guy who had been mixing paint a long time. He did not have any luck matching the medium green poly. I then took my truck to the store and let him shoot a prophet gun on it and still no luck. He called a guy he knows at a PPG location, and after a long talk, came up with a code. He test mixed a small sample and it is pretty close, maybe even a match. However, he said he can only mix this color in a base/clear and not a single stage. Is there anyone out there who has a formula where they have had this color mixed before. As a last resort, I could use the base/clear, but would prefer single. Thanks for any help.