If you are truly broke, look for "Edito B1 épuisé" (out of print) on eBay or ask your local library if they have an interlibrary loan program for FLE manuals.
For self-learners and teachers, the most cost-effective and lawful path is to buy a used copy of the student’s book and access the free audio/video content on Didier’s website. edito b1 pdf