This is the GK one:
KNIGHT, GLADYS & PIPS P.S.R. 362 I HEARD IT THROUGH THE GRAPEVINE / JUST WALK IN MY SHOES / YOU NEED LOVE LIKE I DO DON'T YOU / IF I WERE YOUR WOMAN
It was unreleased but was issued 9boot?) on a white label Soul lookalike:
KNIGHT, GLADYS & PIPS SOUL 20662 IF YOU EVER GET YOUR HANDS ON LOVE / PIECES OF MY BROKEN HEART
According to what I heard John Abbey telling a Motown collector in the early days of the Contempo record shop in Hanway Street there were no Demos of TMG 525 produced.