Bass Direct have one of the standard, German made ones in https://bassdirect.co.uk/bass_guitar_specialists/Sadowsky_Metro_Line_24-Fret_Vintage_J_J_Bass,_Swamp_Ash_Body,_5-String_-_Black_Pearl_High_Polish.html
Found it again
https://www.basschat.co.uk/topic/319377-hard-case-for-fender-mustang/?do=findComment&comment=3466911
https://www.basschat.co.uk/topic/319377-hard-case-for-fender-mustang/?do=findComment&comment=3696989
A Google search I made in the wee small hours, a couple of nights ago, revealed that the Gator XL will fit a Mustang with a tiny bit of forming of the foam, it was a BC thread IIRC.
Using their logic, buying a guitar or bass is a complete lottery. As to hearing a more consistent tone from a particular wood in a band mix, I call snake oil.
Decided that the thumb rest wasn't for me and looked a bit too big for the body size, therefore, i took it off, which gave me an excuse for another photo .
This is definitely a major consideration when starting out. You have to want to pick it up. So it has to feel good, sound good and look right, or it may just end up gathering dust.