[DeTomaso] GTS Fender Flairs?? Differences

[Jerry R Knotts]

I have some front driver side damage in my fender rolled area on my '72 L. 
The tire offset has been incorrect since I have had the car and I didn't 
want to change tires and wheels.

Have been looking at putting fender flares on the car for some time.  I 
think the rivet attachment type.
What are the differences in the flares from the different vendors?  Size and 
composition?
How much of the outer fender lip can be removed with each flare set (if 
there is a substantial difference)?

Thanks in advance to the collective,
jerry