Hi
I made this special mount myself but if you look on the net, you will find some new one
Cost me about 50 $ of steel to make it, very easy to do by any local welder.
I Really like to transport my bike like that since you do not feel nothing when driving, also very quiet, no rattle !
You only need to very carefull when going in reverse since it turn very fast since it is very short.
I have picture if you need to see how it was made
Dominic