3rd Party Content to Magnolia's Search Integration without Google Cloudsearch

Dear all

A customer reached out to us to find a way to integrate ServiceNow content (e.g. IT instructions) to the Magnolia's Search Engine. They do not use Google CloudSearch.

Are there any experiences with 3rd party content in the Magnolia's default search engine in general and ServiceNow content in particular? Maybe already working connectors?

Any inputs welcome.

Thanks