Did you try pivoting the mirrors upward and out? They do not pull out or extend out like Ford but pivot up and down so the mirror is vertical instead of horizontal. Those trucks you looked at may well have had the towing mirrors and you didn't realize it. They work just as well as the Ford mirrors did which is to say "very well"! You can see what I used to drive by looking at the rig photo in my signature. Have not had time or place to take a new picture of our rig.
Barney