Hi. I live in Lampang about 100kms south of Chiang Mai. You are right that jersey is just about non-existent here. However, if you are looking for other dress fabrics there are shops on the roads that run from Chang Moi Rd. down to Thapae Rd. One of my favourites is Narin Fabric Supermarket. I have shown some places on this map which you might find helpful.https://www.google.com/maps/d/edit?mid=zVIpR066wa2o.keq2q-vfI5KoI blog at https://notionallybetter.wordpress.comAre you in Chiang Mai for long?
I'm so sorry, my comment notifications were going to an old e-mail. Thanks for the recommendations, I'll check them out. I won't be here much longer, unfortunately.