My "inbound" 629 is coming from a friendly gunnutter via an Equipment Exchange deal. It was his legal bush carry and looks damn near new. Keep an eye on the EE and have cash in hand ready to go as these guns don't sit around long.
There are also several dealers at the top of the screen, Elwood Epps (midlands Ontario) come to mind. They seem to be well stocked with new and used handguns on a consistent basis, I've dealt with them before and can recommend.
Irunguns may also be of assistance in getting one out of the States...but the wait would cripple this mere mortal. Good luck with the hunt Stralia.
{edit}.Actually, there's a nice 4.2" w 3 speed loaders on the EE now...and the price is right on the money! Don't haggle buy it! $150 less than what I paid for my 5"