Also just to add, another PC (Ly'lan) demonstrated to me a persistent glitch where some of the armor parts options aren't visible for sun elves, particularly some of the left and right hip options (and possibly others).
Yep. This is not a bug. The things that are missing are because the items weren't initially copied over the elven subraces. Each one has it own unique identifier.
I am happy to say that someone has volunteered to fix this (one fix is already put in and awaiting update), others will come in when they are ready.
------- Now back to the OP
Not sure what the protocol is for touching base outfits is. I'd have to see a hak variant will overide your local nwn directory data files (where base outfits are located) first. It has been noted.