Front Door area Squeak

I have a new 2013 Dbl Cab and at about 200 miles it started developing a very annoying squeak only when I turn left. I originally thought it was the door seals but it still makes the noise driving in a left circle with the door open. It is getting progressively worse and is starting to make noise when hitting bumps as well. I have taped up all the door seals to isolate the noise to no luck its not a rattle but the sound of a rubber or plastic on plastic squeak. I am lost at finding this thing and really don't want to turn it over to the dealer to find out.

Any ideas on what it could be. I am almost positive it is coming from inside the cab someplace and sounding from the front or bottom are of the drivers door.

 

On my '12, I've found that reversing over curbs/dirt mounds/snowbanks will work the rivet-style clips out of my front mudflaps. If in the beginning it only squeaked when you had the wheels turned left, maybe it was where the sidewall meets the tread rubbing on the clip. If it's making the noise regardless of whether the doors are open or closed, it has nothing to do with the doors. If the mudflaps are not the culprit, maybe there's a brake hanging up slightly?
Just a few ideas...