Some folks here have got some decent results using a CRT and some bloom filters to emulate Vectors. But it's not the same thing. You don't get that brightness "glow" falloff you do with a real Vector Monitor.
There have been some developments in converting regular raster CRT's into Vector monitors, with a newly developed chassis driver board, and re-winding the tube yoke. But IMO that's an expensive and time invested task to take on.
Another option, if you have an actual Vector monitor, is to try to acquire a Zektor ZVG board and run VectorMame. There are a handful of youtube videos showing this off. The problem is the ZVG boards are rare and expensive. They pop up from time to time on the KLOV forum marketplace, but are usually snatched up quick.
All in all, there hasn't been that much progress on Vector game support. Unless money and time is no object to you, you might want to look into the CRT filters and running on a standard CRT.