A/C clicking noise in back? Help!

[livefit2014]

New here and i have a 2007 Expedition with the 5.4. Its making a crazy clicking noise in the back with the rear a/c on. Ive found a thread on how to remove the back plastic and repair or replace the motors to make this work properly. But now i search and cant find the dang thing! lol. I want to work on making the stupid thing just blow from the ceiling and not the floor and stop making the clicking noise. Can anyone tell me how to do this while i round up the parts to fix it right?

Thank you in advance for any help.

 

[Supersnyder]

I just did this repair! Simple!! Pull off the cup holder, and that long tray. You will see that whitish square flat box with three bolts in it. And a plug on the back side. Remove the bolts, small flat wrench works better then a socket. I got my part off a Amazon!!!
http://www.amazon.com/dp/B004A2D4N4/ref=pe_175190_21431760_M3T1_ST1_dp_1
Motocraft.