Ah yeah, sorry I forgot to check back. Usually when a seller marks their cartomisers as 808 or kr808 they mean it's kr808
d-1. Greensmoke is kr808
d-2, and I have absolutely no idea if anyone sells kr808d-2 in the uk. I've been searching on and off all day but I've not found anyone I can verify as kr808d-2. Normal kr808 cartomisers wont work with the greensmoke batteries, so you'd need an adapter to use anything else with it.
I'd be tempted to get another battery if it's not a priority to stay with greensmoke, but if it is, I can't see anyone else doing the kr808d-2 to kr808d-1 converter piece other than these guys
LeCig D2 Battery to D1 Cartomizer Adapter kr808d-2 to kr808d-1 meaning you could get kr808d-1 cartomisers from liberty flights or someone else and use them on your greensmoke.
They also have...
LeCig D2 Battery to 510 Cartomizer Adapter kr808d-2 to 510 meaning you could use 510 cartomisers on the green smoke.
They are are usa based company but I really can't seem to find anyone in the uk doing this adapter.
I would be tempted to buy another battery if you could to be honest, rather than stick with greensmoke but the option is there if you want to grab an adapter and use something cheaper with it.