I'm going to try the T10 LED bulbs as suggested by 2013_Mali. These are the same bulbs that I used in my 2011 SS Camaro for the interior lights. I checked the original bulbs from the Camaro and they are the same as what is in the Gen 8 Malibu (I have no idea why I keep OEM parts like this). I am ordering my T10 Aqua LED lights and a footwell LED kit from Advanced Automotive Concepts (
http://www.automotivelightstore.com/ORACLELEDFootwellKit.aspx). They are a direct dealer for Oracle Lighting. I have had great service from this company and they honor warranty replacements with out a fuss.
Regarding the footwell kit, I added this same kit to my Camaro and the lights activated with the interior light switch as well as the door switch. They faded on and faded off just like the interior map lights do on the Mali. Connection was made near the fuse box and not up at the overhead switch (light grey wire with a white stripe). Anyways, I'm hoping to investigate or read about someone else finding this similar wire on the Gen 8 Malibu. If I find it I will definitely post the finding and give how to info.