So, is the contract signed by both buyer and seller? That determines where you are at in the process.
I don't understand the "out of town" excuse. I have communicated with and transferred documents all over the states and the world. We live in an age where that is accomplished with ease.
Perhaps your agent can contact the listing agent's broker since there seems to be a lack of experience on her part. Perhaps some coahcing would move things along. That provides no guarantee, though. If the hold up is really the bank, that ....you must just accept...or withdraw your offer and walk away.