preferably it's in the USA (it's for a friend of mine)
Here is some more very usefull info by Tan Dawg:
That's a tough one... Australian made by La Parisenne (or something like that) they are out of business but another company- Replico- makes an almost exact duplicate: http://www.replicofairings.com/ I got a quote from them a few years ago and they were actually fairly reasonable. Like $600 at the time.
More info here: http://www.madmaxmovies.com/mad-max-replica-cars/mad-max-replica-bikes/index.html
I've heard the Japanese company (Whitehouse) is hard to communicate with but they got some cool stuff for sure. If you or your friend knew someone in Japan they might be able to help source it.
Also I found this: Guy is supposed to offer the fairings in the us- email adress: firstname.lastname@example.org
The tail piece is easy- I have one from Airtech- it's a Vesco and it's almost an exact copy of the ones from the movie.
Hope this helps for what it's worth.