Thank you so much for the all input, everyone!

I still have my Poser Pro 2012 Library on my new data drive -- moved over from my older workstation.  So, later today, I'll see if I can load the materials from that location. 

If not, I'm sure there are fabric textures tucked away in my Mapps Materials folder that I can make work.

Nonetheless, it's quite frustrating when things like this get broken.