If your bridge has been knocked over, you may want to check to see if the sound post is in the right position by a professional.
To save any unnecessary damage. As the pressure from 4 strings is pushing down onto the bass and all that is supporting it is a cylinder of around inch in diameter. I may have a case for sale its a Tom and will case with no wheels and the straps have been taken off and put in the back of the case. its a "used" case but still very useable
Pm if you're interested.
-F