You should be able to use a generic supply. Look at FMR's web page for the specific requirements.
Edit: I did a quick look - you need a Wall transformer (that's a wall wart), 9VAC @ 500mA, with a 2.1mm jack.
I got mine from here:
http://cgi.ebay.com/NEW-USA-120V-PO...ryZ23793QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
Just wait the auction out as opposed to the Buy It Now. I ended up getting it for $1.50 + shipping. Good luck!