I bought the official bag, and honestly, it's kind of ******, so I wouldn't but it anyway.
It's the right fit and decently padded, but the material they use on the base of teh interior make the rubber feet stick, and it's deteriorating fairly rapidly, for something ostensibly designed to be used on the road.
Don't run the head in a bag, but go the gator.
There's also a rackmouth kit for it, but why anyone would do that to such a petite amp is beyond me.
I am Jack's neglected P-Bass|This is your gig, and it's ending one minute at a time|Yeah. Well. Whatever. You can't teach a guitard anything.