I have seen khao tung at Siam Paragon, behind where they have the dried fruit and nuts.
For this particular brand, you could call the phone number on the jar.
You could check the Or Tor Kor market near Chatuchak. The market is open daily.
There is indeed one shop at Or Tor Kor selling Khoa Tung. I buy it frequently and it is very tasty, especially the sauce.
Chatuchak has it.
Go to the food section.
Thanks everyone for your kind input.
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