Two available Both NEW.
Tenba Shootout Backpack Large Rolling Black/Black $290 (Vistek selling $319.99+ tax)
http://www.vistek.ca/store/BagsCases/237403/tenba-shootout-backpack-large-rolling-blackblack.aspx
Lowepro pro runner X450AW backpack and rolling (not 450 AW) $290
http://store.lowepro.com/pro-runner-x450-aw