Most likely at DJI Repair service, but I wouldn't bother with all the hassle involved. It's merely a cosmetic addition. Put two pcs of 3M Extreme Mounting Tape between ribs to secure the cable ...
Hello there Picture Factory. Thank you for reaching out and for the inquiry. For us to be able to help you further with regards to the part that you need. It would be best to contact our DJI Support Team at https://www.dji.com/support for assistance. Thank you.