Jerry, there are now 2 double CDs available that cover all his albums. The most recent one is 'Tear Down the Walls (with Vince Martin)/Bleecker & MacDougal' a double CD set of his 2 Elektra albums (I can't give specific reference as I have lent my copy, but it is available through Amazon etc). His 3 Capitol albums are on 'The Many Sides of Fred Neil' Collector's Choice Music CCM-070-2. There is a Fred Neil site:
By the way, whatever did happen to Mark Spoelstra? I have several of his LPs which I enjoyed immensely, but have not listened to in years.