ThorUI version of the Inventory Window
It's always been my objective to keep it small and always up like a hotbar/control center.
The "thorui_window_pieces02.dds" file should be placed in a folder named "images" within your custom interface folder.
Let me know if it isn't what you're looking for and maybe myself or another modder can help you with updating yours.
-edit-
FYI You can decide to only use the inventory window from the ThorUI if you wish. Basically you install the updater and choose which features you like via the features section in the Auto Updater application.
So you could use my inventory window and have it automatically update it from now on AND still continue to use your other interface pieces from other authors.
