The space bar on my ibook G3 (white) laptop is shot. Sensitivity is gone and I need to pound on it to make it work. I'd like to buy a new/used replacement of course, but my local dealer is not being helpful. I live in London, On. Any ideas where I could buy one (i.e. online, ebay, etc) and what a decent price would be? I know installation is easy, I just need to pick one up. Thanks!