Vintage Synth Repair

I've just been given a rare Synthi AKS by a friend to restore.

There are numerous electronic problems that I have yet to delve into, so I'm certain to have other questions down the road.

At present, I'd like to find a new case, as this one is cracked in a couple places.  Failing that, does anyone know of a way to repair that material (ABS, I'm guessing)