Sadly, it's not possible. As for this, it CAN be done, however it needs to be coded and I'm not sure Aga wants to do it nor anyone else wants it done.
On another private server I saw that they had this, and I thought it was just another skill. Like how Aga made the custom Tiger form with Panda stat's. Ect.It wasn't required to have this it was just something you could purchase to add to your character
There is a normal tiger form and a panda form. You can't have two tiger forms to choose from.
I'd rather keep default version.