Re-Tailing Sing and Dance Pinkie Pie

[NinaMarie]

I picked up the big ol Sing and Dance Pinkie Pie at a Thrift store and the poor thing is missing her tail. It's a little sad to see her dance and have the little stub twist and turn with nothing to shake 
I'd like to give her a new one but i've no clue what it originally looked like and how I should go about replacing it. I thought maybe someone in customizing might have some experience with her and advice.
Thanks!