I had to scrounge around eBay to find the CC Green ones. I had to use a stronger CC 10 Green for the stock lens too where the Olympus 45mm took a CC 5 Green.
I discovered Lee Filters still makes them in a resin film. Samy's Camera in Los Angeles sells them online for the cinema guys in Hollywood who tweak their cameras. Seems DJI has allowed this error for a couple of years on their Pro Systems forum website with the X5-series (Here: X5 color temperature settings ). Time will tell if they ever fix it, but given the wobbly props issue, it might be never too.