Looking for Cisco ASA tn5250 plugin

I'm in search of a tn5250 terminal emulator that works as a Cisco ASA client-server plugin. I read an article here on techrepublic that shows a screenshot of someone's ASA config with a tn5250 plugin installed. I've searched and searched and can't find a solution. Would anyone know of such a plugin or where I could find one? Would anyone at TechRepublic be able to find the author of the article below and see where they got that screenshot from?

https://www.techrepublic.com/blog/networking/customize-the-ssl-portal-for-remote-users-in-the-cisco-asa/1385 - in the screenshot in the Client-Server plugin section

I would really appreciate it!