Input tax credit

My question related to excise input credit being non registered dealer under central exise.

1. I am vat registered dealer , but not registered under central excise , as our end user are retail customers.
We buy the exciseable goods from the authorised dealer /distributor of some manufacturer who is is also non registered dealer under central excise. Producer give them Invoice as per central excise rule Basic + excise + cst/vat , but distributor sell the material to us at price including excise ( without any indication of excise amount) + vat.
2. My question, how to avail input tax credit for the the closing stock on account of excise already been paid but no value shown as bought from distributor under vat invoice.