In case anyone is interested Amazon UK [[not sure about other territories sorry, I'm UK based) are selling MP3 files of some Motown performances from various Ed Sullivan shows.

For example:

Come see about me - The Supremes

Stand/Who's lovin' you/I want you back - The Jackson 5

I'm gonna make you love me - The Temptations


I stumbled across them searching for Jackson 5 songs [[and didn't realise you could buy their performances as a medley until after purchasing all three songs separately)

I searched "Live on the ed sullivan show" in digital music to bring more results up.