Greensmoke is E9 = KR808D-2, the thread-incompatible near-twin of the more popular and supported KR808D-1 (aka Vapor4Life)
KR808D-1 is the one with normal-price marketplace support - blank cartomizer styles (stuffing type and reservoir), adapters, long-charge fat-battery models, etc.
leCig sells D1 to D2 and D2 to D1 adapters
If someone has a Greensmoke, AZSMokeFree.com sells a small amount of KR808D-2 stuff, I think including a normal price battery