Very simple.......Screw delete mod.
All you need to do is remove the ach liner screw (which is the screw on the inner top lip of each arch), then pop the liner to the inside of the lip, then carefully bend inwards the bit of metal that the screw was screwed into which will prevent the liner from coming back out, job done.
EDIT: Unless your running 9.5" ET35 wheels on the front in which case then your buggered!!