After spending a ridiculous amount of time tracking down Columbia's magazine, I was able to find Magenta's in much shorter order. It's Movie Mirror from April 1961. I had the cover reproduced on a stiff, glossy cardstock, and as a prop it will last longer that way. You can do a single bend down the spine, or a double bend depending on what magazine you want to re-cover. I used an Opera News magazine - it's size is slightly uncommon (16.5" x 11"). I used the edge of my kitchen counter to get a crisp fold (measure against your magazine, not the page's design.)
I'll have these for sale at upcoming conventions.