Lowes offers Hastings Home Magnetic Garage Screen Door for $10.33 (reg $17.22) with free shipping.

Product Description:
These Magnetic Screen Door Curtains by Hastings Home allow you to welcome a breeze indoors while keeping pesky flies, mosquitos, and other insects outside. Heavy-duty magnets are sewn into the center seams to ensure a quick automatic close every time. This mesh screen seals securely while permitting people and pets easy access.

• MAGNETIC SCREEN DOOR CURTAINS - These handy mesh screen curtains allow airflow through your patio, back, or front doors while keeping out mosquitos and other bothersome insects, they're so easy to open that children and pets can use them unassisted.
• AUTOMATIC CLOSE - Eighteen heavy-duty magnets are sewn into the center seams of these door screens to ensure a quick, hands-free close, the secure magnetic closure leaves no gaps where pesky mosquitoes, flies, gnats, and other insects can sneak through.
• HIGH-QUALITY MATERIALS - These magnetic curtains, constructed using long-lasting materials like tough screen door mesh and durable hook and loop strips, are perfect to use in high-traffic areas during summer and throughout the rest of the year.
• EASY INSTALLATION - This hands-free magnetic door screen is simple to install in seconds with no tools required, once you're done using it, you can fold it up for easy, compact storage until you're ready to put it back up in your home once again.
• Materials: Materials: Mesh, Plastic, Hook and Loop Strips, and Magnets.
• Dimensions: (L) 38" x (W) 0.25" x (H) 80".
• Contains 18 Powerful Screen Door Magnets.
• Color: Black.