Interesting article here on the availability and production of Helium.
http://www.madehow.com/Volume-4/Helium.html
It's a bit out of date as it states we should have run out of the stuff two years ago!
Artificial manufacture is possible but it's expensive.
Last edited by TURIN; 20th Nov 2017 at 09:16.
Reason: Forgot to add the link...