Sounds like it'd be expensive. I used a PC monitor (since I originally planned on running some PC games on my cab) that has a silver bezel. Didn't want to de-case it and void the warranty, but I sure didn't want the silver showing.
I went to an arts and crafts store and bought black foam board. Put that on the front of the monitor with a cutout just for the screen. Between that and tinting the bezel glass, the results are nice. If you look at it an an angle like in the pictures, you can see just a bit of the silver monitor frame. Straight on, it's invisible. Now that the warranty has expired on the monitor I've been thinking about just going around that silver rim with a black marker.

Since I wanted to keep the cab basically original, I just tinted the original bezel with 20% automotive tint. Sounds kind of trashy

but the results are good.
Edit to add... Looking at these pics, which are only a few months old, I reallize how addictive this hobby is. Since these were taken, that Ultimarc trackball has been replaced with a 3" Happs lit with LED's, and the sticks have been switched from T-Stick +'s to Happs Competitions.