You could easily add the stock stacked plate cooler (4 channel) or better yet the stock middle east stacked plate cooler (10 channel) or aftermarket Raptor cooler to your truck with very little modification.
Here's an easy option with the input lines in the right places. Just add it in-line with the radiator cooler there now:
This is our Stage 1 upgraded transmission cooler. If you tow, or offroad your truck, this is a MUST HAVE!
forged-offroad.com
Stock Raptor/Middle East cooler:
DL3Z-7A095-B - Oil Cooler Assembly
www.tascaparts.com
Installation info:
www.f150ecoboost.net
Plenty of options that fit directly onto your truck in the stock location.