Available as an assembled Module and as a DIY project.
This Module is currently available.
Serge Phaser in LW format
More info here:
http://www.cgs.synth.net/modules/cgs90_phaser.html
http://www.loudestwarning.co.uk/portfolio/serge-phaser/
These merchants probably sell this module. Huh?
Included in 18 Racks, 11 are public: