Have you tried Overstock? 

Also, here is Nexttag

If you want to look further, here is the Google search I used.

My concern would be whether you can order on-line and get it in time.

Also, have you checked out any second-hand stores in your area?

Around here some of the Rescue Missions have associated second hand stores.  They would be a long shot, I believe.

I used to have a plaid suit.... but that was way back when.  I don't know where it is now.....maybe still in my parents closets???  I was in high school at the time, so I am sure it does not fit me now.