If you dont care what it looks like, check out the Airmadillo Kombat Kopter. $124 or so.
[link=http://kombat40.com/gyro.html]Kombat Kopter Gyro[/link]
I have a Kombat 40 trainer that I plan to convert to Gyro one of these days with the conversion kit. I also have a Kombat Bipe that is a lot of fun. Ugly as sin but sure are attention getters!