I have a semi-hard Stagg case, its rectangle, a bit bigger than a Music Man case but it has a strap on the back which makes it easier to carry over you sholder.
Like this [url="http://www.playrecord.net/guitar-accessories/cases--bags/bass-cases--bags/standard-soft-case-for-electric-bass-guitar-square-shaped-model-elecbass-guitsoft-case-black.p30726.html"]http://www.playrecord.net/guitar-accessori...ack.p30726.html[/url]