Available as an assembled Module and as a DIY project.
This Module is currently available.
Specs are approved by the manufacturerPhaser
Three separate outputs are provided with 360 degree, 720 degree, and 1080 degree of voltage controllable phase shift. A MIX output combines the 1080 degree phase shift with the input signal to produce the multiple notch filter effect that is usually associated with phase shifters. The VC Phaser's log-conforming characteristics and the manual and voltage controls enable ultra-smooth, precisely centered sweeps of phase shift for both spatial effects and timbral modification.
These merchants probably sell this module. Huh?
Doepfer Module A-125 (VC Phaser)
Doepfer A-125 VC Phase Shifter
Doepfer A-125
Doepfer DOEPFER A-125 VOLTAGE