I was bored and thought of this idea....
This product has the right idea, but it didn't get good reviews....
Undercover Sun Visor Holder - Radar Detector Accessories at Radar Busters
I was thinking, take this product, cut the pocket on the right.
Take the V1 visor mount, connect to the V1.
Put the V1 inside the pocket, make a cut on top of the pocket for the visor metal mount.
Make some cuts for the front and rear antennas, speaker hole, RJ-11 connector.
Put the V1 in the modified pocket.
Should be pretty stealthy eh?