Travers part #61-171-001. $77 + SH. Looks like you could make one.
But it also looks like it wouldn't work on a drill press that has a rack
on the side of the column for table raise/lower. Even if you modified it
to mount around the rack, it couldn't swivel on the column.

This wouldn't work on my machine (6" column with rack, unit is 2 3/4" for no
rack) but looks handy for anybody that has this size drill press.

Karl