you should look into the 'seymore duncan' range of pickups.
they sell humber pickups in single coil size, which means know chopping up your axe (with an axe).
two models to definetly check out.
seymore duncan 'HOT RAILS' these are a high output humbucker purposely made to slot into a strat. they come in neck, middle, and bridge position. they provide a wider output and sustain and suit rockier music.
semore duncan 'little 59' this to is a humbucker that slots into a strat. its based on the classic gibson 59 pickup. its designed to give that classy gibo tone and sustain. it has great dynamics and is pick sensetive. although i think its only available in the bridge position.
you can always mix and match hotrails (neck and middle) and a little 59 in the bridge. you could just add a bridge hotrails or a little 59 so you can get stratty and gibo tones. one problem with this however is, as they are humbuckers they have a distinctive higher output, this can cause problems in bein either to quiet or to loud when changing pickups during a song. unless you have good control over your volume pots or volume pedal.
the price for these is roughly £74.95 each (dont know in dollars, im english). you may want to pay extra for a guitar tech to load them up for you. you could do it yourself but depending on your pickup configuration, you may need resistors and capacitors added to match ohmage.
hope this helps.
