I can find cover at a few place but do not see the lock being available?  I am sure I am not the only one losing them.

if you have a 3d printer you could always print one out

http://www.thingiverse.com/thing:1961778/apps/

I also replaced mine by a locksmith near me and he charged reasonable fee for it. You must also do the same.

I also replaced mine by a locksmith near me and he charged reasonable fee for it. You must also do the same.

If you want to get it at cheap then consider hiring those experts that offers 24 hour locksmith services at cheap.

What are you guys talking about locksmiths? Being cheeky?

Look up the PolarPro gimbal lock. In my opinion it is superior to the original.

https://www.polarprofilters.com/products/gimbal-lock-mavic-2?variant=21866199416916

Edit: holy crap I just realized how old this topic is. Sorry.