I ended up making it use a database for add-ons you might not have.
I can't figure out a good way to search through all the add-ons you have, and find the uinames of bricks right now, I might add that feature later in the future.
For now, if you have a UI that's not listed in the database, you can append the Add-on section in DB_u.txt of the compressed zip.
I'll make an online source so the database will get updated frequently, for now, it's just a text file.
It'll list add-ons that aren't being used, those that are, and those that are missing.
You can click the add-ons that aren't used in the list to disable them, the ones that are missing brings up a download link if it exists on Swollow's Archive.
The button for the GUI is located in the Custom Add-ons GUI when you start a server (to the right of the NONE button).
Enjoy.
Download Client_BrickDatabase