I wonder how you could word the contract such that failure to pay on time would be onerous enough that the big company would actually move on it. Something like penalties + legal fees + treble damages or something.
Good luck getting $BIGCORP procurement department to sign off on that deal. Favorable seller terms will be immediately redlined.
Ask a lawyer!
Our lawyer told me years ago that you are SOL and therefore to avoid doing business with assholes and to try to acquire leverage over debtors where possible and to expect to lose money once in a while.