Indiana allows for discovery in small claims cases:
Quote Quoting Indiana Rules of Small Claims Court. Rule 6. Discovery
Discovery may be had in a manner generally pursuant to the rules governing any other civil action, but only upon the approval of the court and under such limitations as may be specified. The court should grant discovery only upon notice and good cause shown and should limit such action to the necessities of the case.
Ask the court clerk how to bring a motion before the court for discovery, and make sure you're prepared to explain how the materials you are requesting are likely to be relevant to your case.