The Jack Casady bass case seems just a bit too small looking at the internal dimensions here:
https://www.thomann.de/gb/epiphone_e...basskoffer.htm

An acoustic bass case something like this (but with added padding) is probably the lowest cost solution:
https://www.thomann.de/gb/thomann_ju...kbass_case.htm

Factor in some extra foam and some furry covering material and be prepared to hack the insides about a bit. You may be able to pick one up used.