Heater Vent screen, can't locate the correct one.

[Chrislorl]

Can anyone help? Below is the Heater vent on my 31RLDS. I am trying to find which insect vent screen fits this. Anyone have the same?
Thanks

[Treatcg]

I'd like to know also.

[WhiteHawk]

I have a 2014 White Hawk 27 RBOK with a similar vent and had trouble finding the right size screen. Three trips later to Camping World I finally bought the largest screen available. It's a little larger than the vent and rests squarely on the paint but at least no insects will get in.