In following with what I did for previous 50 stamp se-tenants, I have made the page 651-657 hack. The page has a high resolution 300 DPI scan of the whole Wildflowers page in color, along with a PDF form text box that will let you fill in the location of your 50 sheet se-tenant. The back is duplicate of page 658, so you can use it as a drop in replacement for all 4 pages.
The files can be downloaded from my Google Drive here: https://drive.google.com/drive/folders/0B5nZhycYzltRa21JWXYwOFBlSGM?usp=sharing