Underbody Shield problems of the 2010 Ford F-150

On or around Dec 2012 I noticed a water stain in the rear drivers side of the head liner. I assumed I may have accidentally left the window partially down causing a water stain in the winter months. I recently lost my job so I'm not driving my truck very often on April 26th 2013 after many days of rain I noticed a large water stain all along the rear window of the truck,staining up the tan head liner pretty bad. My warranty just expired by 2000 miles so I had my husband take a look at the problem. As we took down the liner we noticed slightly rusted spots all along the trim and water dripping from the rear brake light that's outside the truck near the top of the cabin. My husband believes that the seal surrounding the brake light has a defect. I immediately called atchinson Ford dealer in belleville mi and spoke to service manager he new immediately what I was referring too seems as though they make repairs to these new and used F-150 frequently. I asked the manager if their was a recall on the brake light and he laughed and said "no,but Fords s definitely aware of this problem. I'm concerned that the brake light will become compromised with the wires as well as moldy smell this has caused. I contacted Fords and have a case number opened up concerning this matter,it appears to be a defect in this brake light and or gasket surrounding the window. It will be very costly to me . Can you please look into this matter?a $36 thousand dollar truck should not be having faulty gaskets/seals. I know longer under manufacturer warranty but I feel as though this is a manufacturer problem. Fords would not help in any way so I'm addressing my concern in hopes you can assist me. [xxx] information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).