ha, get this, thats the sound...
Yeah, there are already lots of pedals that can get you into the ballpark:
[video=youtube;-hoAqwU1TgY]http://www.youtube.com/watch?v=-hoAqwU1TgY&feature=related
@3:45, but the whole demo is pretty amazing:
@4:20
Kind of surprised I couldn't find a Modfactor attempt...