Chemical & Engineering News (C&EN) had this story line today (it's subscription only, so the link may be useless). Our labs buy liquid helium by the hundreds of liters, but I know the pain would be felt by trimix divers, too:
http://cen.acs.org/articles/95/i26/Helium-shortage-looms.html
Helium shortage looms
Qatar blockade cuts 30% of global supply and threatens price increases for scientific instrument users
The blockade of Qatar that started on June 5 has shut down the source of 30% of the world’s helium, threatening another round of shortages and price increases for scientific instrument users.
http://cen.acs.org/articles/95/i26/Helium-shortage-looms.html
Helium shortage looms
Qatar blockade cuts 30% of global supply and threatens price increases for scientific instrument users
The blockade of Qatar that started on June 5 has shut down the source of 30% of the world’s helium, threatening another round of shortages and price increases for scientific instrument users.