I have a midnight star 1700 and it had a Champion kit (old straight axle)and wrecked it. After the same search I got a Harley kit and with fanangling it is on. Many problems maybe with the shop all but brakes are great. Love triking. Just a word of caution. Trike life on EBay is not a great way to go.
Got my 06 Roadstar Champion and love it,did a 7º rake on it and wow easy steer.
My ex wife loves. It also.