The Kel Dor modder's resource was released for both K1 and TSL. It primarily needs someone to texture it, but the model could also use some skin weight adjustment for the face if it was going to be used for NPCs engaged in dialogue.
The problem with the Nautolans was the skin weights for the head-tails. I could never get something that worked for a player (or NPC engaging in combat) that didn't have massive deformation issues. They could work for standing-in-place NPCs, but they'd still need to be textured (and 99% of people would cry about lack of a player head version anyway). I never bothered releasing them because who exactly was going to both texture and skin them properly? Nobody.
The problem with threads like this is always "who's going to do all the work?". Even if the JKO/JKA modders gave you permission to port their already textured models, who's going to rig them for KOTOR? There are already a bunch of threads about the same thing for other JKO/JKA models that have gone unfulfilled for years. If you want a realistic chance of actually seeing something materialise, you'd be far better served sticking to the existing pool of models available in the game. Plucking the heads off full body models to allow them to use the regular clothes/armour models is a much more practical goal, and has already been done previously in some cases (both RedRob and JCarter have done so, off the top of my head). You could even extend that to add in hands for those species with unique ones, which requires extra work but is not impossible.