I have also been looking for covers just for High Walls for my HW277 and see only ones for the regular PUPs, so have been reluctant to order one as not sure that it will fit. I bought my HW277 in 2010, it has been ok but I really would like to cover it over the winter.
HTT: "EscapeII" 2016 Shamrock 23WS (current)
PUP: "Escape" 2010 Rockwood HW 277 (gone)
TV: "Bruce" 2011 Dodge Durango V8 Hemi Crew
Just us gals (me, Sis and our daughters)
Traveled 19520 miles and 209 nights in 7 years and counting