For sale:
GL300E remote controller in perfect condition.
Did not use it a lot because I also have a regular remote which I use with an iPad.
$350,- shipped conus
Maybe this will work for you.
https://www.ebay.com/itm/Camera-Lens-Hood-Cover-Cap-Pro-Gimbal-Lock-For-DJI-Phantom-4-PRO-4-Advanced-Hot-/163197212828?_trksid=p2349624.m46890.l49286