OK, after some blog reading I will answer my own question if anyone else is curious about the same thing. It seems like both Easy Energy and Next Energy are using the same price source so the add-on @klaasnicolaas is creating would also work for Next Energy clients. Someone correct me if I am wrong 
At this moment fingers crossed excitedly waiting for the Add-On. Thanks @klaasnicolaas for making this possible.
PS: The pricing difference comes from the BTW incl vs excl.