There are mons in campmap called col_daim_mons_xxx.bif, there are monBIF files in standard, standards and Textures/men. The ones in campmap show the other 6 faction colors, the others are more about heraldy and toppings of big standards. I hope this helps you?

Maybe related, maybe a sidenote. You might find yourself wanting to edit a LDM file for STW too (for example unitcards). You likely won't be able to use modern applications for that. The LDM they make will have side effects. You can find a LDM tool here: https://forums.totalwar.org/vb/local...=d&pp=5&page=3 and https://forums.totalwar.org/vb/local...=d&pp=5&page=4