Bit of an update. I bought the gig bag as per post #5 into which it fitted but it is a very baggy fit and doesn't really offer a great deal of protection. Might as well have put it in a duvet cover, really. ABS bass cases don't fit - it is a really odd size and shape and the minimum internal length needs to be 130cm. Being a cheapskate I didn't want to shell out (is that a pun? nearly...) for a custom ali flight case so I started trawling the interweb for ABS cases used for other things having first of all made a paper template of the various position options. I discovered that the dimensions of this double rifle case indicated it would fit. Just. [url="http://www.uttings.co.uk/p106186-plano-gunguard-se-double-rifle-case-do10586/#.VbetE_lVhBf"]http://www.uttings.c...6/#.VbetE_lVhBf[/url]
It arrived today and, yes, it fits. Just. £55 delivered, not bad. rather than having a shape to cut out the bass is sandwiched in between two layers of egg box foam and doesn't seem inclined to move when it is all shut up. A couple of spare bits on the corners, just for extra padding. Plus regular basses fit in a treat. It doesn't offer the same kind of protection that something like a Hiscox case would but for putting in and out of the car it is going to do a job. I might get some more!
[attachment=197395:katcase1.jpg][attachment=197396:katcase2.jpg][attachment=197397:katcase3.jpg][attachment=197398:katcase4.jpg]
Having spent 2 days trawling the 'net for rifle cases I expect a visit from the CIA soon, of course...
Edit - there is room for a folded up Ultimate Stand in there, too - which this needs to suspend from. Excellent.