I never did. I found someone with the exact same machine, with a manual, on pinterest, but I'm not on pinterest so I asked another sister to contact this person about getting a copy, nothing ever came of it it.
https://www.pinterest.com/pin/75927943696912357/
Here's a Sewmor version for sale maybe? If you're on pinterest you could ask the person if they have a manual.
https://www.pinterest.com/pin/385339311852978479/