Guys, I'm sorry to bother. I usually hunt stuff myself in the vault, but I have been searching for this one for some time now and can't nail it down.
I'm looking for a re-work of the original Cave/Mines tileset that makes the walls icy, showing the same shiny, reflective effect of the original Glacier Tileset. What I'm saying is it is not a simple re-skin, but an actual model re-work that sets extra layers of texture. The Heart of Winter module has an ancient version of this, but is lacking roofs. I'm sure I once saw a roofed version of it, but I can't find it, for the life of me!
If anyone can help, I'll be most grateful!