I've been looking for months to find a case that fits. Finally found this one and it fits like a glove. It's a rifle case so unfortunately now my webs are getting rifle ads, but that will pass. It's an "Elephant Case." Never heard of them before. Under 300 bucks and really well built.
From Amazon - "Waterproof Rifle Hard Case Elephant Elite EL4305W 43" With Pre-Cubed Foam and Wheels for Hunting Long Rifle Shootgun with Magazines, Accessories or Handgun, Watertight Hard Plastic case."