[sdiy] OTA's and phaser question

[Peter Blackett]

Hi,
I just finished repairing an electro Harmonix small stone phaser , and
when its working its sounds nice and warm,due I guess to it adding in a
small amount of distorsion.
previously I had thought of making a stereo version
 ( more for studio use ) maybe like the moog stage phaser ? but I found
that the ca3094 ic's aren't made anymore.
but the Lm13700 ic's seem to be available still.
I just wondered if anyone had made a phaser using the lm13700 ic ?
as I don't want to be re inventing the wheel , so to speak .
regards Peter