Hi Bryce! I am unaware of individuals who may have the entire collection of Southern Pacific track charts, but I do know they are out there. I just searched for Southern Pacific Railroad Arizona track charts on the internet and found bits and pieces of track charts. I did see one on E-Bay for sale after searching for SP Tucson Division track charts. There are some folks who are members of the Southern Pacific Railroad History Center that spent their SP career in the Engineering Department and worked in Arizona. I’ll “rattle their cage” to see if they know where to find the SP Tucson Division track charts. Thank-you for your interest in the Southern Pacific Railroad and for entering the forum with your request! Pete