No matter if the FPV goggles have broken, or you just want a spare lying around in case it does break, you might find this useful.
From Amazon
DJI Goggles Integra - Lightweight and Portable FPV Goggles, Integrated Design, Micro-OLED Screens, DJI O3+ Video Transmission, HD Low-Latency, Compatable with DJI Avata and more.
CVP
DJI Goggles Integra
This product is also available at 1 unverified merchant.