Help!! License Plate/ Trunk Trim Options

[freddy121389]

Ok this is a mixture of both help on the interior and exterior but I didn't know where to put this. I went to go change my license plate cover today and the screws were rusted in, took me about an hour of working with screw drivers and eventually a vice to get them out, 1 of them the head broke off and the screw is still wedge inside and I tried but couldn't get it out, if anyone has any ideas please I would love help.

And now for the interior question. I took of the rear panel off my car to see the inside of where the screw was to see if i could work it out, no luck but the trim that goes on top of where your trunk shuts that little rubbers strip where the clip meets the lock, I took it off but now 3 of the clips are bent and useless does anyone know where I can get replacements?