LeCig, E Cigarette, Ecigarettes, Electronic Cigarette, E Cigs carries the refillable carts for the E-9 (KR808D-2, GreenSmoke, Smoke 51 DUO). They are out of stock at the moment but will have them in 10 days to ship. They let you pre-order them and will ship them as soon as they come in. Great company to work with. Customer service is OUTSTANDING!! 
