individual keys
There is a guy on eBay selling individual keys, for $8 or $10 each. So about the same price as the powerbookmedic.com site (thank for the previous link!). Buying an individual key is the only way to get the white connector underneath.
I ordered a 'W' key and it worked fine, but then a few days later I spilled coffee on the keyboard and broke two more keys trying to dry it off. So I might have to buy a whole new keyboard anyway. !@#$!@ hehe.