The Grapevine in question being the UK label set up in late 1976 by John Anderson and Richard Searling. Here is a complete set of Grapevine 45s, including those with great B sides too, and then many tracks from the three Grapevine albums which never made it to a 45 release.
Oh and just to make it a little more spicy, I graded each release out of a possible 10.