[Accelo]

I fought the tail light trim like you are, they are similar so I am posting what worked for me.
On my first try I pushed too hard and damaged the aluminum bezel. However, after purchasing a replacement bezel I managed to get it to work. First, can you go up a 1/64 on drill size of the holes? Something to consider but may not be mandatory. They be sure the holes are debured on both sides. Typical takes a deburing tool like the one in the picture. Then paint the bare metal if you have any. I used a pliers to collapse the clip as much as I could and retain some shape. Then brush on a little grease on the clips. This worked for me. The reproduction clips are crap in my opinion but it's what we have to work with.
Best of luck.
Rick