Does anyone know of a good golfstore that has a launch monitor, so they can fit me the correct driver? Or just a nice golf store? Either in Bankok or even better in Chiang Mai?

Most central department stores with a sports store have a swing analyzer.

I reccomend going to the All Star Driving range in bangkok. THey have plenty of stores there and in the surrounding buildings.

Do you have the address of that store?

Do you know if there are ANY stores in Chaing Mai that I could buy the big brands(not fake)?

All Star Golf Complex:

518/5 Ramkhamhaeng 39 Rd., (Pracha-U-Thid), Near Meng-jai, Soi Sahakarnpramul (Laos Embassy), Bangkok 10310

As for Chiang mai, I have no clue whatsoever.