They're only $200 for a good one, why not just buy one? Its something you'll need to use in the future to keep your screen calibrated anyway and is a cheap investment. I consider a calibrator to be the single most important thing to own if you're doing any kind of creative work on a computer, be it web design (as you want it for), illustration, graphic design, photo editing for scanned film or digital, etc. None of these things can be done successfully with a monitor that's not calibrated right.