There is an interactive map
that I have created a group on called DbD Gaming. In the DbD Gaming Map there I have posted location marks for all of the Stock Age of Calamitous T4 Thralls of interest such as Captains, Blacksmiths, Smelters and so on.
I have also posted the location of all T4 Thralls that I added through the Pippi Mod. They will be listed in Blue!
I believe that to access this group you must register with the Map site and request that I send you a token that once entered gives you access to the group.