The most direct route is via the developer’s own store:
The elephant in the room. PMDG dominates the 737 NG market, but iFly has the MAX. Ifly 737 Max Download
The iFly 737 MAX is a product, typically priced around $69.95 USD . iFly 737 MAX8 for MSFS: $69.95 - Flight1.com The most direct route is via the developer’s