The only out of print Zappa album is Crusing With Reuben And The Jets by The Mothers of Invention. It's really a shame too because it is fantastic and one of the Mothers' best. There was a version released on cd but it is not the same albumm. Not even close. Zappa completely re-recorded it with Ike Willis and Chad Whackerman and re-released it as the same album, his biggest mistake in my opinion. Zappa's 80's band is awesome (they still play shows under the name Project Object) but digitally inserting them into a 60's Mothers of Invention album was really bad. The original mix of this album only exists in used vinyl.