I found this through Mme. du Jard. This website has almost every issue of a German fashion and luxury journal called Journal des Luxus und der Moden, from 1786 to 1827. There are plenty of fashion plates, and if you read German I’m guessing the texts are very interesting. Just click “blättern” and follow the links for every year and month and you will get to the journals.
Fashion and culture from the 1700s.