Not a flip down but we did convert one bay into an "entertainment bay." Mounted a 3/4" piece of plywood vertically in the smallest bay and drilled out holes for a pioneer car radio and speakers.
Once this was done, I sprayed with "spray glue" and added a piece of indoor/outdoor carpet that resembled our coach color and than mounted a 32" tv on the plywood. Ran the electrical and cable wiring and she's worked like a charm for 3 years.
2001 Holiday Rambler Endeavor
330 HP Cummins ISC
2007 Dodge Ram 4 X 4 (Hemi)