Originally Posted by 12_T_Hatch
I worked for carmax for a while and they would hang the keys to all the cars in lock boxes on the windows. When the proximity keys came out we had the same issues, so carmax bought little led filled bags you tuck the key into then place in the lockbox. It worked like a charm. No clue how much or where to buy though... Hope this helps.
I like it! This could be the answer - http://www.amazon.com/Tundra-Securit.../dp/B00023JL2I