in short supply
Less than is needed, lacking. For example, Skilled operators were in short supply, or The hotels are all full, and beds are in short supply. [First half of 1900s]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.