Jut throwing it out there, I was thinking about getting a similar mount, and found one for less than half the price of blendmount (looks almost the same):
Amazon.com: UltiMount Radar Laser Detector Rear View Mirror Mount - V1 Radar Detectors: Car Electronics
Only 2 reviews for it so far, but they seem to be favorable and its specs look good...if I end up buying it I will post a review.