Hope I-tunes has some of these:
Frank Zappa:
Help I'm A Rock
It Can't Happen Here
Return of the Son of Monster Magnet
(play in that order)
Call Any Vegetable
Invocation & Ritual Dance of the Young Pumpkin
(play in that order)
(this is some of his insane early stuff, the pumpkin song is killer jazz!)
Bob Dylan - Bob Dylan's 115th Dream (Awesome!)
These 4 tracks off of Jimi Hendrix's Electric Ladyland Album are absolutely amazing but they all go together so you might as well buy the album because other songs on it are great as well. If anything get 1983.
10. Rainy Day, Dream Away
11. 1983 ... (A Merman I Should Turn To Be)
12. Moon, Turn The Tides ... Gently Gently Away
13. Still Raining, Still Dreaming
Cream - Strange Brew, Sunshine of Your Love
H.P. Lovecraft - The White Ship, Wayfaring Stranger, That's the Bag I'm In
The Who - Summertime Blues, My Generation, Magic Bus (The Who - Live at Leeds is considered one of the best live recordings ever and is highly recommended to get a feel for the energy these guys had)
The Beatles have too many to list, the albums 1, Sgt. Pepper, Rubber Soul, Revolver, Magical Mystery Tour, are all amazing.
The Doors Best of Cd is worth getting but some select tracks worth getting
People are Strange
Break on through
Crystal Ship
Alabama Song
Spanish Caravan
Light My Fire
Don't want to use up all your dough

hope you like any of these that you download!