I'm considering a vise like that also. Or maybe one with mounting ears.
I am going to do my own version of what the guy in the video below did. It lets you move your vise in the "Z" axis. Front to back. Then you can use some parallels in your vise to hold the work piece. Then you could move your work piece the "X" direction. Side to side.
I was then going to use a hold down clamp that I have that goes on the column and reaches over and clamps down.
I was thinking of using white nylon, like what a cutting board is made of, so it would slide better. But that may not be necessary.
This is just all thinking out loud right now. Hell. I don't even have a drill press that works,,,lol.
I guess I could just skip the fancy vise mount and use my clamp to hold stuff down. But then I wouldn't have a cool thingamajig that I made now would I.