Air Cleaner Lid seal wanted

[70vert]

anyone know a source for this item? I have a standard dual snorkel, big block air cleaner, and the seal is falling apart.
Roseville has it listed but out of stock.
Summit has one by OER but says it fits GM, and doesn't show any measurements.
Mega Parts has one, but is twice as much as Roseville, and again no measurments.

The cleaner is just under 18" across, so needs to be about 56" long (circumference).
Any suggestions appreciated. Not looking for OEM just something that fits. Probably lots of things will work as substitute, just drawing a blank.

[EV2RTSE]

Check with DMT I think they carry one
https://www.detroitmuscletechnologies.com/

[70vert]

Check with DMT I think they carry one
https://www.detroitmuscletechnologies.com/

Thanks!!! they do have it in stock so I'll give it a try. And put DMT in my source list 
Still no dimensions but I'm more confident with them. And the price is right.