Where to buy high quality fabric

Where are you exactly?

If in Hanoi then there's a wholesale market that only locals running fashion businesses go to. It runs along Ninh Hiep and is very big and busy. First section sells dresses and then you'll get to fabric shops before coming to a section of market with casual clothes.

From what I'm told, people go there to buy wholesale to resell. A lot of different styles are cut from the same fabrics that you can also find along the street. Some of the shops won't sell individual items to you but not sure about fabrics they sell in rolls.

Good question, where do I go?!!

Hope this helps http://www.bobbinandbaste.com/post/fabric-in-vietnam

After a bit of cloth... then head to those touristy traps she mentions.

If your trying to source large quantities of fabric and want to venture out of the city try
https://en.wikipedia.org/wiki/Ninh_Hiep_Fabric_Market

Google : Lang lua Ha Dong
Follow the Google Maps directions
Use Google translate to bargain there.
It is the best place in Vietnam to get high quality silk
If you want to buy bulk then its a different story