I have gray vinyl siding on my house. The vents are made out of white
plastic. The vents on the south side of the house are so brittle that
they break just by a gentle touch.

I contacted a building supply store today, and they checked with three
vinyl companies and my twelve year-old vents are no longer made.

Is there any reason I could not buy wood or metal vents for a vinyl
sided-home?

It looks like one vent could run about $30. I don't want to shell out
$400 or so for 13 new vents. Two are bad and they are on the south side.

Would it look bad to just replace the vents on one side, even if they
are a different pattern?

Any other suggestions?

Many thanks.

Kate