Perhaps a little innovation here

Medpage: Hospitals across the country are reporting a shortage of IV saline solution, blaming manufacturing problems and increased demand from a harsh flu season.
The FDA said in a drug safety communication that it's aware of the shortage and is working with three manufacturers -- Baxter, Hospira, and B. Braun Medical -- to "preserve the supply of these necessary products."

One might think:
Buy bottled water, sterilize and add salt according to required solution. But it has to be done right and evidently medical technicians are not too good at this. Still, one might think MDs have the capability to do supervise this, they are the ones who specify the concentration to begin with