Here are a few that I would love to find:

"Skiffle in Stereo" by the Orange Blossom Jug Five (Lyrichord LLST 773) -- Dave Van Ronk's first record

"A Guy Called Carawan"   Guy Carawan (English Columbia SX 6065)

"Four For Fun" Rory & Alex McEwen with Richard and Carolyne [sic] Farina (Waverley ELP 113) -- a Scottish EP that included Richard Farina and his then wife Caroline Hester.

"Home Made Songs and Ballads" Paul Clayton (Monument M4001/SM14001)