Looking to fit a touchscreen overlay to a 15.4" laptop, similar to the ones everyone has been fitting to netbooks for a while now.

Having trouble tracking down a DIY kit?, as most are things that just clip on and not too sure if one of them can be torn apart? I know I have space inside the laptop for the controller board and could I not just plug into a USB header or solder onto a USB port internally?

Anyone done this? Maybe gimme some pointers or send me in the direction of where they bought their kit? All I've found after 20mins of googling is this which I guess is what I want, but also all the way in Austrialia.

Laptop is a Compaq C300, with a budget of maybe £50? Figure for that money will be resistive, but not fussed as more just for kicks, than serious use.

Cheers.