I bought a pair of the large extendable towing mirrors from Summit Racing for my 150 SuperCrew. They looked like the Lucerix mirrors, but weren't labeled as such. After going through the process of removing the door panel and the stock mirror, I found that the new mirrors wouldn't fit. The mounting holes in the SuperCrew door are different than the other F-150s.
So a note of caution if you're going to order direct from Lucerix, and you own a SC .... Be sure to ask if they are built to fit the SC.

 

I did the same thing last spring. I ordered direct from Lucerix for my SCrew, and they did not fit. Lucerix gave me a full refund including shipping. They were great to deal with, just wish I could have used their product.

John