If its any help, I found this, posted by u/Gargari 2 years ago on reddit
Historical map of the Lake Chad basin between the start of the reign of Mai (king) Idris Alauma of Bornu around 1570 and his death ca. 1600
I include his notes
""A little bit of background:
To my knowledge, this is by far the most detailed map that exists on this time and region. In the process, I extracted information from about 35 academic publications (I could send these if requested) and have been in contact with a few professors who specialize on this topic. I was able to include some of the locations of towns from a old map from Palmer, but apart from that, I entirely had to put the pieces together from the numerous sources.
With this map, I hope to contribute to a popularization of this fascinating era of Human history. Due to eurocentrism in historical science, this region is arguably under-researched (although great scholars like Augustin Holl work hard on changing that) and there is almost no popular awareness about this époque, although it is all but boring. There is almost no easily accessible literature for persons that aren't informed about the issue and even the Wikipedia pages on this part of history is an absolute mess.
And yeah, I'm proud like crazy about this work, the process of creating it was really intense and consumed a lot of time, but I'm quite happy with the result.""
link to page