Plastic ring that fits between air cleaner and carburator

[61Conti]

I'm currently having the 430 from my '61 Lincoln rebuilt. I just finished painting and powdercoating all of the components and when putting the air cleaner back together I noticed the black plastic ring that fits inside the bottom of the air cleaner is dented and cracked. I know most people would probably reuse the part anyways, but after spending this much $$$ I don't want to skip it.

Does anyone have a clue where to find this obscure part?

[Theo]

It's probably good to see a photo, so those who don't drive the same could possibly be of help too.