A number of quad only Impulse! Records titles have been reissued on CD this year. The original albums were all QS encoded. I don't know if the CDs are QS as well, but they might be.
Universal Consciousness / Lord Of Lords (Impulse 2-on-1) by Alice Coltrane
Huntington Ashram Monastery / World Galaxy (Impulse 2-on-1) by Alice Coltrane
Village Of The Pharoahs / Wisdom Through Music (Impulse 2-on-1) by Pharoah Sanders
There may be others.