No demo 45s but in fact Capitol throughout the 6Ts regularly sent out promotional 12" LPs to radio stations to promote their product in all the various music genres. These LPs would have about 3 soul tunes, 3 country songs, 5 or 6 pop tunes by the Beach Boys , Lettermen etc.
I have about 15 of these LPs , cherry picked them out of a batch of 100 or so that I came across in an old warehouse many years ago . I pulled the ones with all the key soul tunes - Patrice Holloway Stolen Hours, Checkmates Kissing Her , Alexander Patten, Bobby Paris Walked Away, HB Barnum Heartbreaker and many others ....
Sound quality on these LPs is unbelievable with Checkmates Ltd and Patrice Holloway being slightly different and superior takes to the 7" released versions.