Look for Sambar Kitchen Tamarind Puree Concentrate on Amazon Prime.
Sambar Kitchen on Amazon:
http://www.amazon.com/s/ref=bl_sr_grocery?ie=UTF8&field-brandtextbin=Sambar+Kitchen&node=16310101 
Look for Sambar Kitchen Tamarind Puree Concentrate on Amazon Prime.
Sambar Kitchen on Amazon:
http://www.amazon.com/s/ref=bl_sr_grocery?ie=UTF8&field-brandtextbin=Sambar+Kitchen&node=16310101