Ftwz transaction

In following scenario How we can do the business without CVD \ Excise \ Custom Duty \ MahaVAT \ CST??

Supplier - Inside SEZ (Outside Maharashtra)

Trader (Our Company) - Outside SEZ \ EOU \ FTWZ \ SEEPZ (Normal Working Area) (In Maharashtra)

Customer - 100% EOU. (Inside Maharashtra)

We dont want to pay any Tax because material procure from SEZ going to EOU.. We are only act as "POSTMAN"

Please Help...