Etienne de la Vaissière has kindly shared this map of the Zerafshan valley in the 7th century on academia.edu. He states:
Map drawn for my Histoire des marchands sogdiens, Paris: Collège de France, 2002, map 5. Please feel free to modify and adapt it to your needs: the layers can be modified in Illustrator. Although I have drawn it I claim no copyright, but would welcome that you mention the source.