You could share the list of addresses with the community
OP disappeared the day he arrived, but this isn't ideal for privacy. And since I expect OP to have a list of both addresses and private keys, it makes a mistake in copy/pasting risky.
You are right, there is a risk for OP to do the wrong copy-paste and share the private keys, i mean, is common sense that no one should do something like this but common sense is the less common of senses. I hope OP comes back someday and finds the solution in our answers.
I was thinking about a universal tool for this, a tool where we give a text file with addresses and it runs and verify if they have balance, maybe this is a job for Mr apogio.
The logic would be something like:
1.-We create the text fixe with the addresses.
2.-The program downloads the list of addresses with balance from LV site.
3.-The program compares the address.
4.-The programs create a new file with the address with the balance followed by the amount.