You probably couldn't get away with doing what I did with my melodeon, which was going to a drugstore and buying a soft sided cooler. My melodeon fits in it perfectly, it's much lighter than the hard shell case, and it has a shoulder strap. Also it makes it look like lunch, which may make it less vulnerable to theft, or more, who knows.

Some guy on eBay says,

DO THESE CASES HAVE MUSTY ODOR? K-MART CARPRT CLEANER, VACUUMING AND OPEN TO SUNSHINE ARE ARE SOLUTION TO MUSTY CASES. THEN ,LATER, PUT IN LAUNDRY ANTI-STATIC SHEETS TO KEEP THEM SWEET!

Couldn't have said it better myself. Well, I could, but I won't.