Damn. That sucks dude. While its not perfect you could still swap a 25" TV tube in there and buy a replacement monitor chassis. I'm pretty sure they still sell those.
You can make it work one way or another even if you need to replace the display with a newer system.
Well if i had easy access to a 25" TV, i'd do that. In fact, the tube that died came from a TV. i bought a chassis/frame from folks on KLOV, and got VERY lucky to find a 25" TV on Craigslist. I then went and merged the tube and the chassis and had a great monitor for a little while. it took me quite a few months to find that TV. I figure shipping a TV would be easier than a tube, but then you have to hope that the TV you get has a compatible yoke. I guess this is the frustration of working on obsolete technology. Unless you live close to others in the same hobby, you're SOL when things go wrong.
Pardon me while I wipe the tears out of my eyes.