The A126 comes with one for hanging by the cassette toilet. Made of the same stuff as the curtains and has Velcro along the top edge. There are several screw in Velcro discs in a row in the roof by the toilet.
I'd imagine you could do something similar using either the Sam method, or use an extra long shower curtain rod and make your own Curtis .
I've never seen anything g from the factory other than the privacy curtain on the A126 models like mine.
2011 FR Rockwood Premiere A126 Hard Side
TV=2011 Jeep Wrangler Sahara 2 Dr
Reese 66065 WDH, Curt WDH Shank #17120
Prodigy P2 Brake Controller, Mopar 7-pin Harness
B&M Transmission Cooler (#70268)