I've been trying to put a vertical divider between two columns in a pivot table in an analysis. I really just wanted to put a thick border on the left of the Projection column, but when I do that, then all the default lines on the left, top, and bottom disappear from the column. If I put a blank column, a background doesn't work because of the alternate row styling. The screenshot below seems to be the best I could do. But honestly I don't like it.

I've attemped to use CSS to style only the left border without success. I also attempted to manipulate the width of the divider column with CSS with no success.
Seems silly to me that the border styling is all or nothing.
Has anyone come up with a better workaround for this?