Here's what's currently available... 

Gibby Haynes (2020)

Cokie the Clown (2019)

Greg Graffin of Bad Religion (2019)

B.A. of Sloppy Seconds (2019)

Bob 2 from Devo (2018)

Eddie Spaghetti of the Supersuckers (2018)

Andrew W.K. (2018)

Jesse Michaels of Operation Ivy (2017)

Milo of the Descendents "Mini" V1 (2017)

Lee Ving of Fear (2016)

David Cross (2012)

Joe Queer of the Queers (2012)

Joe Keithley of D.O.A. (2010)