You can try the below, all have been shipped PowerFactors, though I can't say for sure if they still have stock. We have stock and you can have any Eventide dealer order one for you or purchase direct at http://www.eventidestore.com. Also, Musician's Friend and Sweetwater may have stock.
NY: PG Music (http://www.pedalgeek.com/cgi-bin/new_shop.cgi)
FL: Bass Central (http://www.basscentral.com/2003/index.php)