The Ray Agee Krafton releases may be ALCO presses but must be 1964 at the latest, Soultown wasn't in operation then, Ray's Losin' Again is a July 1967 press from monarch and on vinyl. I don't hear Sandy on backing vocals?
"Loads out there" I doubt that very much I, and many others have known this record in excess of 25 years, no other copies ever turned up before Ebay, If there was any significant amount it would've surfaced before now.
I had the MLK promo 45 years ago found in Chicago along with a Motown Corp. promo letter, I sold it to Pat along with a load of other stuff, not the same as the one on his site as mine had no label stains.