i m going to tell u a desi ideas..
find any THERMOCOL , which is square in shape , or with any shape, i m talking about thermocole which come with box pack fridges, tv and other appliances.
now take a knife or some thing and put some big holes in it gently..!! put as many big size holes, try to make as many holes as possible on the upper part and sides of the thermocol, without disturbing the stability of it.
3.it solves half the problem but if u want more cooling, then take a working CPU fan, take any old data cable take the usb part out.. and attach wires,and fan will work..attach the fan anywhere u want..!!
this is the best working IDEA that works like a charm for me