Moving each asset into a collection in the .blend file would enable support for the asset browser. This would be awesome. I suspect you could even write a Python script to do this pretty quickly, since each asset is already contained within a null.
It would be nice to have a pdf catalog with renders of each model in the kit to help jog your memory when deciding what assets to migrate into your scene. Might be good to post on the web too to help generate sales.
Like the Blender Asset Browser suggestion; including a .lib4d collection of the individual models. Right now each kit I need to reset the coordinates, put them into a Library, and for Octane render out individual thumbnails for every object (In R23. Unsure if 26 ~ 2023 properly render Octane thumbnails or not)