Does anybody know if this is available anywhere?
The domain seems to be gone.
Retrocomputing Stack Exchange is a question and answer site for vintage-computer hobbyists interested in restoring, preserving, and using the classic computer and gaming systems of yesteryear. It only takes a minute to sign up.Sign up to join this community
If the site and company are no longer in existence then it may have to come down to using one of the many online auction sites ( eBay / SellMyRetro ) etc amongst others to see if said CD Rom is up for sale there.
Assuming it is not in archive.orgs CD software collection that is and you want or need original media.
Copyright status I could not comment either way on as the material in question I am not familiar with.