Hello _The Doctor__
I did tried to find disk image of Matrix Solutions infinity suite on Bing.com or Google.com or even Atarimania.com. No available anywhere. Yes, I understand, you said, they did gave away free demo real diskette. But the problem who were those people had the their copies of demo software and transfer into disk image. Will those people willing to copy and transfer from their real Atari drive into PC or M2 Macintosh ? I wish I would love to visit their CES 1985 Expo !
Interesting link : https://www.chicagotribune.com/news/ct-xpm-1985-03-08-8501130835-story.html
That guy, Garofalo was responsible for developing of Infinity. Is that guy still alive today ? Yes, he was teenager that time in 1985.