There is plenty of information on how to set things up. Not a whole lot of information on getting things NEEDED, like DRIVERS. Yeah, if somebody cares about you pirating 30-year-old drivers, THEY are the ones with the problem, not you.

So after searching and searching, here are some sources for this crap. I checked, and the URLs and programs provided should be available at archive.org.

There is one more thing, however. Starting with VirtualBox 6.1, hardware CPU virtualization was forcefully enabled. This means that Windows 3.1 networking will only work properly on VirtualBox versions below 6.1. You have been warned.

• Connecting to the WWW With Windows for Workgroups 3.11 - Christian Liebel
• Install & Configure MS-DOS 6.22 & Windows 3.1 using Oracle VirtualBox - Socket 3
• VirtualBox and Windows for Workgroups 3.11 - Basil's Tech Diary
• Tony's VMware Site | Unfortunately gone; the zip from Archive.org has the same hash, fortunately.

The last site seems to have a new successor at this site.