When considering moving from a popup to a TT, we seriously considered one as well, as the screened room was the one thing which most made PUP camping so workable for us. However, we finally determined that the hassle was not going to be worth it for us on a TT (we were originally looking at an expandable and ended up going with a Windjammer). We decided that the need to manage one's awning much more closely with a TT than with the PUP (to prevent weather damage) just made it impractical. I'm not aware of an any easily detachable options and they don't roll up with an awning. Anyway, we have now learned to camp without the screened room and don't miss it. Good luck.
2013 Windjammer 3008W
2006 Chevy Silverado 2500HD 6.0L w/Equalizer 4
Nights camped: 2012 (29); 2013 (26); 2014 (40); 2015 (43); 2016 (35)