best advice is to buy from a YT sewer, there are lots of really good ones here. All will make to your size with your material or theirs, most have very QUICK lead time. Like someone else suggested check out threads in the fashion forum and the YT seller area. Also check out the pawject runway threads you will see a lot of their work there. I sew but don't sell, so don't contact me.
Here is short list of YT members that I know that sell, I know I left off some.
Rubymoon
Dawn
Normarae
Southernbelle
Connie
you will find most of them have posts in the fashion forum, LOL it's where all the sewing diva's hang out