No matter if the camera filter has broken, or you just want a spare lying around in case it does break, you might find this useful.
From Amazon
Saramonic Lavalier Mic with USB-A Connector for Computers with 6.56' (2m) Cable (SR-ULM10), Black
Athema Services
dji zenmuse h20(eu)_sp incl. dji care enterprise basic cp.zm.0000011