My new Inferno will be here Tuesday. But I also would like some blank cartridges for my v2 Standard battery and don't want to pay $1.79 for a blank cartridge. Can anyone steer me towards a supplier and product number for new carts that would fit? Fortunately something told me not to throw the old ones away and I have been putting them in a box since day 1 so I have lots of used carts that are color coded so I can put a coffee type juice in the old coffee cart and not have it taste too weird. Would love to find some blank carts.