Identify Vent Lid (Resolved for now)

my Box Van has a 24x24 escape hatch ...... never did find just the lid and had to buy the whole thing.

Looks like standard size, buy a Lexan replacement, you wont be sorry. They are thicker and alot stronger. We have them on our hauler, cept the rear one its metal to keep out light......

New vents are cheap and fairly easy to replace. Might be easier to just go buy three new vents, a couple tubes of Dicor and strip them off and install new ones.

Thanks all... appears I'll have to pull one off the roof to distinguish between the "Ventline/New Elixir" vs. "Old Elixir". Looks like the Ventline/New Elixir has a vertical slot near each end of the hinge -- not something I see in my photo. Seems odd a 3-year old trailer already has old style vent lids?!

You can tell the brand names of the vent lids by looking at the hinge style, It will be ventline, Elixer or Jensen. Here is a link to what the hinge look like, match up you old lid hinge with the drawing and then you have it.
Vent lids

It could be a Ventline. Look at the end of the hinge. If it has some sheet metal bent to lock in place it is Ventline.
I would suggest getting vent hoods. They prevent sun damage and allow the vents to be used in any weather and when motivating down road without damage.

Looks like an elixer lid. Check out this page to help you determine the correct replacement.