I finally fashioned a useable ref screen that is compact enough to fit in my FRP bag. I started with the inner panels designed waaay back in 2010 by Shane Mangus over at Swords Against the Outer Dark. I altered the player-facing side by including my own art (inside the now-tainted Decanter Room) and, a-la Judges Guild "Judge's Shield," added to-hit, saving throw, turning, and a couple other bits of info duplicated on both sides of the art where players can access them. (I also adopted the "Judge's Shield" canary yellow color.)
The build the screen I printed the 6 sides separately (i.e. 1-sided) in color on an Ink-Jet printer to water-proof photo paper. Next trimmed the outer edges, basically everything outside the print-area of the printed page so color went edge to edge. Then bound first with 2" width book-binding tape the inner-facing pages (so outer seams would only expose the non-glued side of the tape). And finally used an Elmer's glue stick to fasten the outer pages against the inside ones.
If you are interested in making your own screen, or just want to see the sides close-up, here are PDFs of the yellow-colored screen and a regular black &white one...