Worgen models for WotLK

Hello guys, would there be any option to have cataclysm worgen models instead of human for example? I know it's possible to get the legion models for each race and I also know you can change up models from for example orc to tauren. But could you add a worgen model and change it in Data folder? I tried to find anything about this but I only found an really old post with file attachced to it that is no longer avaible. Is anybody experienced with this kind of things?

Many thanks