I bought the Gentex K21 Auto-Dimming reaar veiw mirror with compass and temp and the mirror wire cover from Autoanything.com for $210.
This is a great mirror with the Boxster and the outside temp and compass are a big help.
Only issue is finding a path to run the temperature probe up to the lower grills on the bumper. Had to remove the headlights, front trunk liner, etc to find a path for the cable. Had to feed it through a few rubber grommets in the firewall. It can be done!!!
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