Hi there @Herefordbull and welcome to Grey Arrows!!
If it was a Mavic Pro, I could advise you on a whole bunch of cases, but I don’t have the Air so I’m bot best suited to help with this one.
We’ve quite a few Air owners here, I’m sure someone will be along soon to share what they have.
Are you looking for a hard case? A back pack? Something in-between?
To give you some idea of the sheer amount of variants out there, check out this thread on Mavic Pro cases, it’ll give you some good insight to the types that are out there:
Welcome once again 