If you are looking for inexpensive, I would suggest trying to find any factory 14" Accent GT/GSi, Elantra, or Tib rims. There are also 15" Tib and Elantra 4-bolt rims around that fit, and with either size there are bargains to be had. Check the 'For Sale' forum, and call your local dealer(s) to see if they have any 'take-offs' from upgraded cars around.
Just avoid buying cheap, heavy, after-market boat anchors. They will do nothing for handling, and probably cost you more. If your budget is tight, a better tire on a 14" rim will serve you much better than a cheap tire on a 15" rim.
Just my $.02
- JP.8D