We wanted a removable screen for the upper section of the passenger door on our MH. Bought a screen kit from Home Depot and made a custom fit removable screen, it is held on with velcro and blends in with the OE door perfectly when it is in place. You might consider that approach fir your liwer screen.
'07 Winnebago Journey 34H, ISB-02, MH2500
Toad - '08 Ford Taurus X
Blue Ox, Aventa
US Gear UBS