At a hardware store buy some stiff, noncorrosive wire (around 14 gauge copper) and a screen door repair kit (together you shouldnt spend over $15, probably not even $10). Bend and cut the wire to fit over the holes as the original filter would (you can see the channels where it goes in) and then cut the screen about 1/2" bigger on each side. Fold it over the wire and "sew" it to the other piece. It's cheap, it works, and if you do it well, nobody can tell.

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Current:
2021 Charger Scat Pack Widebody "Sinabee"
2018 Durango R/T

Previous:
1972 280SE 4.5
2014 Jeep Grand Cherokee Limited "Hefe", 1992 Jeep Cherokee Laredo "Jeepy", 2006 Charger R/T "Hemi"
1999 Chrysler 300M - RIP @ 221k