Where to get 273 Head Gaskets?

Like you said, they all seem to be the over 4 inch bore deal, and yeah, that gap fills with carbon rather quickly. Couldn't find ones under .039 compressed so I made my own from .020 aluminum. What a pain! But correct bore. Sounded killer too with the improved compression. I'd post the pics, but I have a feeling that I'm not permitted yet. I decided to go another route, so now they're just hanging on the wall.
I remember a place that could make custom gaskets, any bore, but they cost something like $200 a pair or more! Yikes.