I don't remember the thread, but someone here has one on their board. Maybe check the post your pedal board thread.
I've often wondered about using these myself, but more as a preamp. I don't think it will make your electric bass sound like an upright or an ABG if that is what you are after. I've also read on a recent thread that it adds a lot of hiss to your signal.
EDIT: Here Ya Go. Mr. Pickle has one on his board...(you may consider Private Messaging him). Here are the relevant posts from that thread. Enjoy!
Post your pedalboard part XVII - muscles in the tongue Post your pedalboard part XVII - muscles in the tongue Post your pedalboard part XVII - muscles in the tongue