I ordered a replacement from carmirror.com for a '99 Contour. Mirror only cost $65.00 and that included the powered version. You will have to paint it as it comes in flat black. You can order the paint and spray it yourself.
The removal and replacement is really easy. Look carefully on the inside of the trim and you'll see a small circle for that plastic plug that covers the screw. You can pry it off with with something sharp. Once you get past that the rest is very easy