Hi ya
I have kind of fitted some. Well I made them !
Got a net curtain pole from Home sense, cut it down to hang on the coat hooks behind B pillars. Then got a flat black bed sheet cut in half and hemmed all way round created a pocket to slide pole through.
I only use it if being stealthy ! Don't swivel seats Don't put roof up just use RIB and close curtains, doesn't look like im camping then and gives privacy for sleeps