Every "Block" has been made at least one time. 50 years ago even 100 hundred years ago women were not worried about copyright laws. The directions are what are copyright protected correct. Most generally those directions are hard for newer generation sewers and quilters to understand. Even I who learned how to sew with women who were in there 80's and 90's when as knee high to a grasshopper made it seem hard.
Can you write the directions in a manner keeping with the tradition and still credit the original author as giving you the original inspiration. There are many designers and pattern makers doing that now. It is recycle reuse but I call it relearning what we already knew in different language. I was blessed to learn my skills from women who were experts and had very nimble fingers.