Another good one, available for the moment, is NE Aero's "Zeph-air" 120 bipe. I just ordered one today, but I called first to make sure they're on hand. The closeout price is $160 for the kit.

By the way, they might make a limited run of the Twin-Air 45 kit in January, if there's enough interest. They ran a closeout price, and exhausted their stock, but people have been calling.

Good luck,
Dave Olson