Most "industrial" displays support 15 kHz. A few examples:
Siemens SCD 1815-I
Siemens SCD 1898-I
Products from Omni Vision
Search Google for [color=FF0000]15 kHz industrial lcd[/color].
Quite a few video monitors support analog RGB inputs, but they won't have the resolution computer displays do.
In either case, expect to pay $1000-$2000 (or more) for something semi-decent.
Trev
