You can buy a Chinese aftermarket (comes from China) on Ebay for $80. (Or OEM for $200.)
In the meantime, stop at your local auto parts are us and buy some translucent RED tape to cover the clear LEDs. Its made for this use, to cover broken plastic break lens. (Is @akirby still in the forum? 🙂
Usually accepted by the cops as an accepted method of temporary repair. (The third brake light is a DOT requirement in all states and you can get stopped for displaying white instead of red.)
Call your local Ford service and get a quote as to how much it will cost for replacement and labor. Then call your insurance agent and see if you can claim on your comprehensive policy (may have to pay the deductible, mine is $100, but I'll bet the cost would be upwards of five or six hundred. Two, two-fifty for the lens plus two fifty or three for labor — I'm being generous, of course its going to be more, what with sales tax and all that.)