Reverse search for sent SMS via API

To support our services, we often do a search to see if the SMS are sent/delivered. We regularly have requests for verification after several weeks. We cannot find anything on the API that is longer than 30 days. It would be great to have the option to do a reverse search for a specific number for more than 3 days (e.g. at least 3 months). This would help us a lot to become more efficient than exporting the logbook and searching for it.