convex rear view mirror attached to the upper left corner of the windshield with a suction cup. Thanks to John Russell for the tip. Really opens up the rear vision on the driver side of the car and I don't feel like I'm driving blind. Cost a whopping $4.99 at Auto Zone. Best five bucks I've spent on the Cobra.
Next best thing is a big convex rear view mirror mounted on the dash. Between the two mirrors my rear vision is darn near as good as my forward vision. Look in my gallery at the interior photo and you can probably spot them.
Jim
