Now, of course, what of Construction Materials, Inc? Surely they buy the raw materials from someone and ...so on. Everyone does - or should do - the same: don't adjust the terms, simply accept that the past due items are past due and will be paid a bit later than normal.
Eventually it will hit a bank or large financial institution, and they ought to do the same: accept the situation and wait. It's costly when businesses go bankrupt and everyone knows that this situation is affecting everyone else and will blow over in about six weeks.