If I'm not mistaken, U can get one at electronics shop. Not the one selling audio equipment, but those selling elec. components like resistor, capacitor, rechargable battery etc. Get the one with battery charge indicator.
Done using 3/8" thick plywood... bought from a hardware shop near my place in serdang... de board itself costed RM35 n RM5 for transportation... measuring 4ft x 8ft...