Ac Adapter only solution to this problem?

So, I have a G-Tech Mini drive that typically operates on Bus Power from an external enclosure. Normally I have the MBP plugged into this enclosure and daisy chain to this drive and everything is good. However I recently added a NewerTech Voyager Q to the mix and whilst it has two FW800 ports it doesn't provide bus power to anything hanging off it. So unless I'm mistaken I'm pretty much stuck if I want access to the NewerTech Voyager Q and the G-Tech Mini drive at all times. So I need to shell out $20 to purchase the AC Adapter that goes with the G-Tech Mini drive. Anybody know of the Nokia Phone chargers will work as a substitute as I have two of those laying around but I don't know if the polarity is compatible or not.