1965 273 Head Gasket Question

I was combing though the forums here and had read that. There seemed to be some debate weather they had been made anymore for some time from what I could tell as well as how much compression would be lost and that for a street driver it would be negligible.
I don't know. I've run many compression scenarios using different thickness and bore size head gaskets and there can be a pretty big difference. I think about the smallest off the shelf now is the 4.040. I haven't seen any 4". The original 273 gaskets were under 4" if I am not mistaken.