I don't know anything about modelling and animations, so forgive me if I'm crazy
But I'm wondering if there is a mod existing somewhere that alters the Akulakhan model and applies one of the existing Morrowind creature-skeletons to it, so that it works as a normal creature (obviously down-scaled quite a bit).

Officialy there's none, unofficialy theres "Akulakhanized" Imperfect, i dont remember who made it, but i got a copy of it somewhere