Locally one person who makes costumes is famous for making kilts but they are not kilts they are skirts that look like kilts and have darts in the front that interrupt the tartan's pattern.
I know about the way they are made because once a year, on April 6, I give my students extra credit for wearing anything tartan. Several times one of them has rented a 'kilt' from the civic theater and I've been able to see that her fame as a kilt maker is not deserved. Of course, I've not said anything about this to the students, but several of us who make kilts in the Spokane area grit our teeth when someone comments on the great 'kilt' maker at the Civic theater.