RE: Speer Grand Slam Bullets
RDJ, not sure where you live in Canada but a buddy who uses this bullet ordered some from Wholesale Sports, so I would contact them to see if they still have some stock in the Calgary Warehouse - if you have a WS outlet near you they will arrange for a store transfer so you'll pay no charge for shipping. You may also try Russell Sports in Calgary or SIR Mailorder out of Winnipeg both of these use to stock Nitrex brand ammo and may have some stock for you.
As far as getting ammo shipped it ain't going to happen to a Canadian consumer from the US. You may try asking your local shop if they would be willing to do a special order for you from the link provided. The only other option is either reload or search out somebody willing to reload for you.
Best of luck