Getting fish shipped over the border involves a substantial amount of paperwork IIRC ( Even plants required a certificate last time I looked ).
I've ordered from J&L Aquatics out of BC a few times. Great looking fish and the best pricing I've seen for most items. They have a few WYSIWYG items from time to time. You just have to go to the airport to pick them up. Ordered my LR from there as well. Great customer service.
Of course, you didn't mention where you are located so people could possibly help with local stores.