I really enjoyed in three places in Thailand. Bangkok, Phuket and Pattaya.
I want you to enjoy and fulfill your desires too.
I researched and found this forum to be very helpful in finding places. Please read thoroughly. I wanted to fulfill my extreme fetish for asian straight hair before my life ends...atleast once.
And, I was successful this summer in Bangkok too.
thailandredcat.com/happy-ending-massage-in-bangkok/
I stayed in Sukhumvit Soi 23 area. I noticed that there is a hotel called Taipan Hotel (thats not where I stayed though) which also has a alley connecting to Hilton on the other side. It appears japanese nationals come to fulfill their desires here too. Right in front of this Taipan Hotel, there are couple of massage places. They are quieter and affordable and girls are patient with you. They don't push against time like other high demand tourist areas. Nearby there is Soi Cowboy, where all tourists hang out, but not many that I saw came towards these massage places opposite to Taipan Hotel.
Also, there is a place called 999 (japanese style soapy massage place) on the nearby Prasan Mit Alley, which is expensive and I didn't go there.
I was very very lucky that I found silky straight haired asian girls to me likeness for three consecutive days (and nights). I didn't care if they were too old, too tall, as fucking was not my main goal. Fourth and last day, I still enjoyed even before departing for airport. I had a paragraph of google translate in advance and saved as a text on my phone about what my hair fetish is about and had her sit down and read by the masseuse as soon as I had chosen her. I wrote down that I will be very gentle and want to touch and smell her silky shiny straight hair, that it turns me on more than boobs and nakedness. That i wanted the lights on so that I could see the beauty of her silk and touch it. That I want her to sit down in front of a mirror and brush her hair with a hair comb. That I want to put her hair up in a claw clip, let it loose on her back, smell her hair crown, hold her from behind and kiss her neck and hair. And, I also wrote down that in no way I will pull their hair or cause any kind of painful gesture that would hurt her or be any reason for disrespect of women or thai culture.
They/she really appreciated this clarity right at the beginning and they whole heartedly helped me through sensuous 60 mins or 90 mins sessions. My brain and cock is still pulsating just thinking and writing about it.
There are definitely other places as mentioned in the above thairedcat page for mongerism, as it is upon your luck who are available during the time you are there. It is to be expected that Not all girls will be comfortable with your hair fetish.
Wish you luck to have fun.