Pass service tax by importer (trader) to manufacturer

We are importers (registered as dealers with Excise Dept.) of steel and undertake customs clearance and then sell it to manufacturers in our state. While we pass the complete CVD and SAD to our customers (manufacturers in excise dept.), can we also pass the (CENVAT claimable) service tax to our customers, that we pay while clearing of goods at the customs, since it is a substantial amount? We are not currently registered with service tax dept. (but will get registered if we can pass the tax) and do not collect any service tax from our customers.