I am pretty sure I have the slim sensors. They are very thin (half an inch or less) and look a lot smaller than the pictures of the regular sensor. I Purchased the set below.
For the front sensors, would you say mount them in front or behind the mesh grille? I am pretty sure the guy meant in front because they need a clear line of sight to the road.

Laser Interceptor HP LE QUAD
HIGH POWER LIMITED EDITION QUAD
***SPECIAL ORDER***
Allow 2 Weeks for Delivery
THE ULTIMATE JAMMING CAPABILITY

-Each Sensor Contains 2 Laser Diodes for Higher Power Jamming Capability
-One Horizontally plus One Vertically Polarized Laser Diode
-Special "Optimized" 7.06 HP CPU with "TruSpeed" Voice Alert
$ 2450.00 - FREE Shipping in The USA
$ 35.00 - Express Shipping to Canada