Every version of Office is still easily found online... and even if you did want to go the truly legal route for some reason for 30+ year old software, there are still many physical copies left in the world already owned by existing users and developers, or readily available on ebay etc... so I don't think it's fair at all to say it is "unavailable" or "impossible", unless you mean purely from a "buy this new from Amazon or CDW right now" type thing.