David Lin carries several brands of ballroom dance shoes at the Regent
Ballroom's dance shoe store in Savoy 359-5333
For cheap dance shoes, go to the bottom of the DI web page
http://www.uiuc.edu/ro/dancing
and follow the link for info on cheap shoes.
Also, you will find some ballroom cheap shoes at
http://wcic.org/~ballroom/index.html