Problem With L4D Models

hey guys, I have a small problem with the l4d models in Gmod, which I have encountered with Gm_mount2 and when i downloiaded the models off, its a very small but annoying problems

with the survivors(l4d1 and l4d2), and ONLY the survivors(not the infected), the eyes(yes just the eyes) have a “missing texture” texture(purple checkerboard), anyone know how to fix this?

I have also deleted and reinstalled l4d since the first time when I got the models off, but it has the same problem when I used gm_mount

EDIT:Im not going to bump by adding a comment but i find it annoying how some posts get hundreds of replies and some get none because newer ones get bumped