go get new suction cups, and get a black vinyl strip for the top 4" of your windshield. Now you have a little shade, more or less.
Take the fuse holder in line in the radar dectector wiring, and solder two wires off of it, making sure that you shield them (heat shrink tubing)... now you have to find a remote access power... ground the cable that goes to ground (duh) and tap into your fuse box for a hot lead that's on via the ignition switch. I used *(runs outside to check) 52, which was unused in my car (heated seats or something).
Now that you have power, run the wire up the A pillar close to the headliner and mount near the A pillar, or run the wire to the headliner and run it near the rear view mirror.
It's stealth, and comes on when the car is on.