If I not mistaken, Mac Baster found ACTUAL punch tapes with software for Setun-70, but he was not able to decode it
P.S. And he also scanned A LOT of books and papers about Setun and Setun-70 (most of them with actual code listings)
I have most of them in digital form (TIFFs)
I hope I will find time to publish it here in near future...