I have found that arcade bezels never properly fit PC monitors, the tubes are not the same size, and they tend to be flatter than arcade tubes. My 19" PC monitor is too small for a 19" arcade bezel, my 21" kiosk monitors are too large for 19" bezels, and both of them are flatter than the arcade bezels are designed for.
I have just been making my own bezels.
Arcade bezels DO fit TV tubes of the same size though.