I forgot to answer the other question:
So... now that I have two machines that want to have
3.5" drives and
no copies of DOS 3.3 on that medium, is it possible to aquire it anywhere?
I have Macs, etc., so I can make a 3.5" disk from an Apple disk image
if that's what it takes.
Apple never supported DOS on 3.5". There were some third-party hacks, but
I've never obtained copies.