Where does one find high-contrast street maps online?

Would it kill websites such as Mapquest, Google Maps, Bing Maps etc. to offer a ‘high contrast’ option? What we might call a monochrome-printer-friendly (ideally in ‘draft’ mode) option? Perhaps the problem is me, simply not having figured out (yet) how to set the display preferences. Or is it a yet another case of necessity-creep; the tendency to design websites (and everything else) with built-in assumptions, like ‘everyone has broadband’ or ‘everyone has color printers’ or the despicable ‘everyone has a car.’