There are quite a few places that I have found to have really good people with good credentials. Your in Burnaby right?
Ocean Quest
http://www.diveoceanquest.com/
The Edge
http://www.edgediving.com/index.aspx
In White Rock
Ocean Pro Divers
http://www.oceanprodivers.com/
those are the shops I recommend there are others but I have not had any experience with them.
J