Is this the green one?

Some if not most engineers in NSW will probably say no. My suggestion is to contact as many engineers as you can, I do know of some that used to engineer these a year or so ago. Failing that I would contact the RTA and ask to speak to the head inpector for further information. Advise that you are looking to purchase a vehicle in the ACT that is engineered and registered but you are wanting to register the vehicle in NSW. If you get the ok, make sure you get it in writing.

If you like I can pass the info of a place that may engineer it for you in NSW.