Here's the link where I bought the tailwheel. Awsome place to get motors, speed controls, and batteries. It is shipped straight from China though, so you need a big enough order to minimize the shipping. Check out the 1:6 scale pilots too, they actually look pretty good for the price. Same basic wheel is available from Dubro for $14.69 at Tower.

[link=http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=4671&Product_Name=Tail_W heel_System._w/_Steering_&_Spring_60-120_Size]Hobby King[/link]