You can purchase the student version of Winner directly from ProCAT ... but you might call and have them put you in touch with your local ProCAT rep. There's a new program that got started last month where you can rent the software for about $59/month until it's paid off.
I have a request in to locate your local rep; I'll post his/her info here in a couple hours (hopefully!).
Do you need a writer as well? The rental program definitely applies to both the Flash and the Stylus (though the prices are different, if I recall correctly).
Turns out ProCAT is offering a better deal for the student software: $95 flat fee. With that, you get 8 support calls.
As for your local ProCAT rep, turns out she's on vacation, but you can call Cathy Logan at 1-800-255-8801 or shoot her an e-mail at cdlogan (at) procat (dot) com.