Norton Records has issued 14 "unreleased takes" of Sun recordings to newly pressed 45s.
These titles are available from a number of sources but well recommended (I first heard them at a bar in Amersterdam).
"Fourteen giant massive brain busting Sun label scarcities! Twenty eight humongous sides all in superb Sun/Norton sleeves! Think you've heard 'em all? Try again with this batch of brain scorchin' Memphis fryers!"
841 CARL PERKINS Her Love Rubbed Off/ KEN COOK Problem Child
842 DICK PENNER Move Baby Move/RAY GARDEN This Chick
843 JIMMY WAGES Take Me From This Garden Of Evil/TOMMY BLAKE Better Believe It
844 WARREN SMITH I Like Your Kind Of Love/ MACK VICKERY Fool Proof
845 HAROLD JENKINS Rock House/ Crazy Dreams
846 ROY ORBISON Domino/ GENE ROSS Everybody's Trying To Kiss My Baby
847 RAY HARRIS Come On Little Mama (alt take)/ JACK EARLS Take Me To That Place
848 MACK SELF I Vibrate/MACY SKIPPER Bop Pills
849 HAYDEN THOMPSON Fairlane Rock/ERNIE BARTON She's Gone Away
850 BILLY LEE RILEY She's My Baby/GENE SIMMONS Peroxide Blonde And A Hopped Up Model Ford
851 GLENN HONEYCUTT Rock All Night/JIMMY WAGES Miss Pearl
852 SONNY BURGESS We Wanna Boogie/Thunderbird
853 RAY HARRIS Lonely Wolf/JIMMY PRITCHETT That's The Way I Feel
854 CARL PERKINS Put Your Cat Clothes On/WARREN SMITH Stop The World
I know that Norton has also put out a Jerry Lee Lewis single with an outtake from High School Confidential (something like 3 or 4 false starts before he finally gets the intro right).