I just picked up mine today and changed it. I used the store brand from O'Reilly's Auto Parts, #4018. It comes with a full set of instructions (with photos) and also has the arrow for air flow, which the MotorCraft part did not. Price, $6.99 plus state gratuity. It is made by WIX, but a few dollars cheaper. Seems to be good quality, and equal or better then MotorCraft.
I could not believe how bad it was after only 8000 miles. I also changed my engine air filter at the same time, same thing, filthy. So, on schedule to change both at the same time.
Thanks for the reminder!