Better fitment of Rear Splitters? Options

[M4ddoX]

So I picked up some TRD rear splitters (copies im pretty sure not the real things) and repainted them to Super White but like alot of the rear splitters they dont seem to fit very well. It seems its either have it close to the body with the end sticking out or the end in line with the top sitting about 1cm away from the rear bumper. I was wondering if anyone had any ideas on how to better mount these to get rid of this gap. I have thought about widening the holes they screw on with abit so to angle them abit better because I have tried body tape but it just pops off becuase as it is currently it takes too much pressure to push them up flush with the car.

Ill upload photos of exactly how they sit one the sun comes back up