I have a flat screen monitor and was able to resolve the problem by using a router. I secured my bezel to a flat working surface facing up. I then used a router with a slot cutter and carefully cut the curved surface away, which left me a flat surface to mount against my flat screen monitor. I lightly sanded the newly cut area until is was smooth.
If your T.V. has a slight curve that does not match your bezel, you will have to create a template of the curve and transfer it to your bezel for trimming.
John