Any help would be appreciated
I made some statues of Boethiah and Mephala for my Face of the Hortator mod (check my sig). They're not very complicated or pretty, but you're welcome to use them. They are based on the OM_statues.
Well, there's already a statue of Boethiah in the game. Unless you're looking for a different style? TR also has a Mephala statue in their data.
These statues are supposed to be for a secluded alternative temple and they would be in their shrine area.