To be more precise, the deprecation was made in 2018 and the official announcement of the removal of 3rd party Plugins was made on July 25. see the official announcement linked below.
This removal will impact all 3rd party Scanners and Metadata Agents that are based on the Python 2.7 dependency.
Unfortunately, That announcement doesn’t state any alternative only that they “are working on it”.
Unless you @Nackophilz, want to get a feel for how the data is being retrieved from your metadata source, developing a metadata Agent wouldn’t be something I would recommend as of now because at the end of August, the first servers (Nvidia Shield with the Beta Branch) will not be able to use it anymore.