Some call this the best auto wah ever made:
http://mirosol.kapsi.fi/2013/08/ibanez-af9-auto-filter/Very flexible, with reverse sweep...
The only thing that is lacking is an integrated distortion, like the Ibanez AW7
It was sold with different names:
Ibanez AFL
Ibanez AF9
Maxon AF9 (reissue)
Ibanez AF201
Maxon AF201
Maxon AF-01
Maxon AF-F1 "Fireblade"
But only the AFL schematic is known - maybe they're all identical.
schematic:
http://www.freestompboxes.org/download/file.php?id=27779&mode=view