hd map mod for inventory screen

[Lugia]

are there any mods that change the blurry as hell textures on the map to something better.

[Ghost]

Due to how the map works, not really.

The Morrowind Code Patch has an option to disable map smoothing which makes it appear pixelated instead of blurry and sharpens the location boxes. Might suit you.
https://www.nexusmods.com/morrowind/mods/19510

Alternatively, OpenMW has various options that affect both the global and local maps.
https://openmw.org/faq/
https://openmw.readthedocs.io/en/latest/reference/modding/settings/map.html