This Pedal is currently available.
6-stage optical phaser with tap tempo and envelope functions
The Moon Rabbit is a 6 stage optical phaser with tap tempo and an envelope follower.
The 6 analog phase stages are voiced halfway between a Uni-Vibe type pedal (staggered phase filter caps) and a more traditional phaser (identical phase filter caps).
It has 8 available LFO shapes and an expression pedal input that can be assigned to control the rate or the range of the phasing.
http://www.drolofx.com/product/moon-rabbit-tap-tempo-envelope-phaser/
