Banjoteacher.com has a great selection of hard shell, gig bag, shoulder bag cases with back pack straps, soft shell, zero gravity light weight banjo cases that protect like a hard shell and banjo flight cases too
Banjo Case for Flying at BanjoTeacher.com
Soft shell padded banjo gig bags with shoulder straps including TKL, Boulder Bag, MBT, Goldtone and Morgan Monroe Stone Series
The best prices for hardshell banjo cases made especially for banjo by the top companies.
Heavy duty hard wood banjo cases for both resonator "bluegrass" and open back, "old time" banjos.
LIGHT WEIGHT HARD SHELL BANJO CASE / TKL ZERO GRAVITY
5-STRING LIGHT CASE FOR BANJO