Here in the states you can swap out the pots, switch, wires, caps and jack for about $30USD. Then drywall the entire control cavity under the pots and under the pickups, and on the back of the pickguard with copper shielding tape. A roll of that stuff varies in price depending on how much is on the roll and where you buy it... $10-20 for that stuff. You can also just unsolder the entire wiring harness and stash it somewhere if you don't like the results. Leave the pickups in the guitar. I've done that change to several Squire and Mexican Strats, always with good results. By replacing the cheesy/cheap pots, switch, etc, etc the pickups you have can now breathe. Very similar to installing a set of headers on a small block Chevy motor. The cheap electronics they use are strangling the potential of the pickups. By making a sort of "can" out of the copper shielding tape, most all of the typical single coil hum will be gone. A lot cheaper fix than buying Noiseless pickups.