Doug they are available in Australia and they are great.
We use them at the Mapleton Observatory on open nights for fust the purpose you were looking for. I'll have a chat to the person who bought them for the Observatory and let you know where to get them from.
I have heard though that you need to be careful with them as they may cause problems for people taking astrophotographs in the area if the beam crosses through their field of view. Has anyone else heard of this problem.
Paul