LUA as in the scripting language?
If so, you are out of luck since the ESO API is, wait for it, written in LUA ...
Unless you mean AUI, in which case you can simply download AUI and use it as a base and write your own AddOn.
In that case, replace AUI with LUI in my comment above.I have fixed to read LUI. Work all day and dealing with LUA errors and other things really mess with the brain.
Yeah I dont like LUI extended anymore either. it used to be better than it is now. the new layout sucks.
If you don't mind me asking and you happen to read this thread again, what in particular do you dislike about the newer features of LUI?