Repair Eave Mesh?

Need advice on how to go about screening the eave vents on our home. Original was tacked on the inside which we can't do now. Thought about using 1x3s in 22.25" lengths and drilling holes, but don't think it would provide enough airflow. The opening is actually only about 1" in height. Tried using a Glavanized Eave Vent, but it doesn't fit cleanly and don't know if paint would cover cleanly. Could use some suggestions. A photo is attached.

Thanks in advance!