Creative Dressmaker In Chiang Mai?

I have had a skirt made at Warorot market which wasn't too bad (or too good) , and the seamstresses there have done some basic alterations for me in the last two years. Thanks are due too to the lady on the corner of my soi, who has a brilliant eye for knowing exactly how much to take something in without even measuring me.

The job at hand requires someone who is a very capable seamstress and who can "think outside the square"... someone with creative flair and a great sense of style. I want a dressmaker who can copy the basic design of a dress I already have, but can incorporate some slightly different features ( a stiffened collar, a high waist-band, a fuller skirt).

Can anyone recommend from first-hand experience a brilliant dressmaker? (I can convey most basic ideas in Thai, and will learn any specialist vocabulary needed if the person has no English).