A really amazing sale right now on Anovos TOS style uniforms at the link below for a Black Friday sale. These are really great costumes (this is the brand I wore in Austin). If you decide to order, make sure to order at least one size up - they run on the smaller side.
http://www.roddenberry.com/star-trek-apparel/star-trek-t-shirts-dresses-apparel (http://www.roddenberry.com/star-trek-apparel/star-trek-t-shirts-dresses-apparel)