MIDI synced ADSR envelope generator?

[elephantgrey]

I am looking for a pedal (/box/thing) that i input a MIDI clock, and a gate (my bass), and outputs an envelope via CV? I really would like to control the ADSR with syncronised AD&R (like 1/2 1/4 3/8 1/4* 1/8 etc). Is anything like that available?

Basically i would like something like [url="http://www.synthesizers.com/q109.html"]this[/url], but with midi sync.

Bonus points:
In a box (preferably pedal shaped)
LFOs
Gigrig friendly powersupply

Thanks in advance for any/all help.