check craigslist.com or call Tom at Texas Supersport over in Garland. They are awesome to deal with and mount and balance for $5 wheel if you buy tires from them (off the bike) or $10/wheel (off the bike) if you bring in your own tires. They are CMRA racers and should have some take offs as well, or if you want new ones they have a sweet sale on BT016s right now.
214-680-1724