I lived in Chiang Mai for about 2 years. Thailand does not have good fakes. Believe it or not, Laos is really where I got the wallet, in Vientiane or Luang Prabang. But they get their stuff from Hong Kong. The store is in both cities, it’s called the Walk Man or something like that. Most of the stuff in those 2 stores is high quality fakes.
We still have a house in San Sai Noi. My wife is from Phrae but got her nursing degree at Payap. We enjoy the area but are getting too old to travel much so a Nephew is using the house now.