It's the V7 that's only available in Canada. That's a combo seat. The V6 is a highback booster and is only available in the US, from what I know. I've never seen one here in Canada.
Here's the V6
Amy- SAHM, tandem nursing, co-sleeping, cloth diapering, carseat checkin' mama to Peter (4.20.08), Jasper (4.25.11), and Ruby (4.11.13). Wife to Chris