RPM Records continues to leave no stone unturned as it explores groups and artists that may have fallen between the cracks over the years. A recent release from Grapefruit is no exception. Throughout their relatively short existence, the members of the four-piece pop-psych band Grapefruit enjoyed the imprimatur of The Beatles.  Signed to Apple Music Publishing, the band was given a major promotional push but never attained any major success on the singles chart, and by the time the album Around Grapefruit appeared in 1969, the group had already split.  Yesterday’s Sunshine: The Complete…