Anyone know where to get Nitrate Salt? Or how to make them?

Jul 2018
1
0
Malaysia
I've been looking for nitrate salts all over the web but can't seem to find anything. So please and thanks!
 
May 2017
94
0
thailand
EBay is the first place to look ...some potassium nitrate there ... rather expensive.

My local shop (Thailand) sells pure Potassium nitrate very cheaply as a fertilizer in 1kg bags.