This TRD dealer has the TRD wheels for the FR-S listed at $225 a piece. You'd be getting OEM quality for about a grand but it doesn't include tires. Maybe buy wheels now and save up for tires?
http://www.toyotaterritory.com/Scripts/default.asp
Disclaimer-I am not affiliated with this dealer, just saw someone else post a link to them on another thread. I also put it in the budget wheels thread.