Adapter for Coleman pump

It looks like my brothers uhm misplaced the adapter for my mattress pump.

For some reason Google doesn't want to cooperate with me in search of the replacement.

Links to website where I can purchase one are really appreciated.

Here is the pump http://www.coleman.com/coleman/colemancom/detail.asp?product_id=2000000834

and the 6V adapter

( pic under the cut )

And of course Coleman doesn't even has a parts page for this pump :(