i am thinking more in the line of getting another usb cable and cut the computerside plug and connect the power [ red and blk] wires to 5.2 VDC supply i have spare used for my old router
that should work , i hope
in the meanwhile i found a nokia AC 2n mains adapter for mobiles in my old electronics parts collection
which has 5.3 VDC 500 ma output with suitable power pin as shown below
hope that works. i will try and get back here
image of the power supply
http://imgur.com/xFFz1E3