If your current door screen has broken, then you'll need to buy this replacement ODL retractable sliding door screen from Home Depot, or something similar which would fit in your door opening. At Home Depot you can find a couple of nice door screens, entry doors, sliding doors, metal doors etc... by brands such as Andersen, Masonite, Legacy etc...
These ODL retractable door screen replacements are affordable since they are priced from $130 to $170, so it won't rob your wallet completely if you're in need of a new screen. These ODL door screens are easy to install yourself, and since the screen material is made in fiberglass, they are very durable and should last for quite a few years to come. You can find these ODL retractable screens in white, bronze as well as sandstone, and while most people will probably pick the white one, in some situations it might look better with a colored screen in an off color, that all depends on the style of your house and facade.
ODL, Inc. 36 In. x 78 In. Retractable Screen in White for Sliding Glass Short Height Doors 6 Ft. 8 In. (Out-Swing Doors)
"The ODL RTMXW01 retractable screen is for sliding glass doors, short-height (6 Ft.6 In. in-swing doors) and 6 Ft.8 In. out-swing doors. The overall canister heights 79-7/8 In. from top of unit housing to bottom of housing. The screen covers doors up to 36 In. wide or double doors up to 72 In. wide. Two screens are needed for a double door application. . Replacement screen cartridges are also available should your screen ever become damaged."
ODL, Inc. Standard Height Retractable Screen in White
"The ODL Retractable Screen is 81-3/16 In. from top end cap to bottom end cap and fits 80 In. in-swing doors and is designed for an easy do-it-yourself installation. The rugged weather-stripping in tracks keeps dirt and insects where they belong - outside. The screen has all the advantages of a traditional screen, but when retracted it blends with the door frame to provide a clear unobstructed view. The screen material is made of durable fiberglass, designed to resist damage from hands or pets. The Retractable Screen comes with a 5-year limited warranty and is available in white, bronze, and sandstone. Each screen covers single doors up to 36 In. wide or double doors up to 72 In. wide (two screens required for this application). Replacement screen cartridges are available."
These doors are from homedepot.com