Good friend of mine Moonstonewind has My Little Pony custom works up for grabs please jump to her account and give her work a looksie. I can tell you all from seeing her work first hand she does some AWESOME MLP custom work and for a lot lower cost than others who modify the Gen 1 - current ponies!
White wolf tail http://www.furaffinity.net/view/10149425/
3custom mlp
See gallery