well... I'm not positive, but you can probably put almost any ( save for a nintendo monitor) arcade monitor in there.
Wells Gardner/happs et al... sell 19" arcade monitors... but they you have to pay shipping.
It's probably best to talk to local distributors (or that guy you bought the gorf from)... locally to me there's a guy who caps/refurbs monitors and stuff...
kands monitor pageThat's just an example ... me personally... I would pay 75 - 125 for a 19" used/refurb arcade monitor... *shrug*
ONe technique is to buy ANOTHER game that is super crappy (or has good monitor/missing boards) and take the monitor from it =P
*Shrug* that's just my opinion.
rampy