I've been looking at 930's, as well.
From what I have managed to glean - the SPX is the model that has the ghost ring sights - and because of its tube capacity (7), it won't be exported to Cananda.
Apparently, a few were brought in - but I've looked everywhere I could think of (online) and have not been able to find anyone retailing a 930 SPX - new or used in Canada.
The model that is being exported to Canada (other than the sporting varieties, of course) is the Home Security (4+1 - bead front sight) and a god-awful "Road Blocker" version with a mall-ninja's wet dream of a contraption a-fixed to the end of the barrel.
Does anyone have any info on how a few SPX models managed to make their way north of the line?