Quoting Heavenfall, reply 6I don't think it's possible for modders to do it because the screen has no support for showing/hiding things based on what traits you have. Gaunathor if you have a working way to do it, please share. It is someting I would be very interested in - for example a custom faction could have access to a special assortment of magical items.
I just meant making it available in general. Making it dependent on the presence of a tech is something I have no idea yet how to do. I'm just not that good of a modder. Still, I keep thinking about it.
Well I meant what Heavenfall thought, to have it upgraded by perks, since I might dwell in mods at some point in the future, in any case else, helping getting a few upgrades to the modding community probably will pay me back with some interesting mods at some point 
Sincerely
~ Kongdej
