It would make an excellent thread topic and, like yourself, I'd love to know what other soul records were relased there. Things like "Comin' Home Baby" by Dee Dee Sharp and "The Champion" by Willie Mitchell were issued on 45 out there. These tracks are only available on LP in the States.
Other question that springs to mind is that were they only targeted at the black South African population, given the Apartheid situation there until 1990?
Would also be interesting to know how many were issued as 78s - I think they were pressing 78s in South Africa until around 1965. So, early Motown a possibility? I guess this is the point where we call on Tony Rounce's help - you got any nice SA label scans you can share?