You didn't mention the places you are going to visit.If you are in Delhi,better go to the Kashmir Government emporium,Baba Kharak singh marg,where all the Government emporiums are from all the Indian states.Central cottage emporium,on Janpath road,opposite hotel Imperial,new Delhi.If you are going to the Rajasthan,then try to find a small cities where there are no taxes or some charities from Kashmir have the stores.. There is one in Jaislamer called Cottage gallery,also has good reputation,doing it since 20 years.
Wherever you go and buy please ask for the authenticity certificate along with the bills,trust anyone who does some kind of tastes showing you the originals...