Here's another option:
The Academic Quilter
http://academicquilter.blogspot.com/ is doing a BOM for the RSC17 (Rainbow Scrap Challenge)
http://superscrappy.blogspot.com/201...enge-2017.html. Here's the post for her first block:
http://academicquilter.blogspot.com/...lt-purple.html
You could make an awesome rainbow quilt!