I'm not aware of an existing theme that provides an I-bar that you describe, but, I found writing my own cursor theme (in my case to override just the pointer) relatively straightforward, so I would encourage you to try. The themes can inherit from others so you would only need to describe the I-bar in yours.
https://jmtd.net/log/amiga_pointer/ -- Please do not CC me for listmail. 👱🏻 Jonathan Dowland ✎ j...@debian.org 🔗 https://jmtd.net
