I've got a Gator rigid foam case with straps, pockets, zipper closure, and sized for a dreadnought. My thought is that if they make one for a 12 string it might fit your elongated headstock. I've used this case many times for my oddball size guitars and simply packed in some laundry to take up the dead space.

Google Gator and you might find a site...I haven't looked yet.

Peace, Mooh.