In 1974 I bought a Seeger type long necked Epiphone 5 string made In Kalamazoo. It had been sitting in the warehouse for (maybe) 10 years and did not have a case. Because it was the nicest thing I had ever owned I arranged for a case to be made for it. What eventually arrived was a case that housed it beautifully, but was unfortunately guitar shaped. The gigs I was doing at the time enabled me to stuff large quantities of free beer and cheese (kilos of the stuff) into the spare space in the case at the end of an evening.Perhaps I should have included this in the recent thread of tips for musicians. Buy a guitar case for your banjo.
Regards John