Plus size dress suit in Council Bluffs iowa or Omaha Nebraska...?

I am looking for a black suit pants and a blazer I dont know where to look im a plus size teen and need this for a school thing. I need it on the cheap but still cute. Please help! I need to buy it at the store rather online because i will definately have to try it on. Im about a one or two x! thanks for the help in advance!