Source for 273 Head Gaskets??

MR. GASKET #1121G SBM Head Gasket 4.140 Bore .028 thick

Book it! MR. GASKET Thin Steel Shim Head Gasket

Thanks to Toolmanmike for the legwork here 273 Comando Head ??
Interesting that Mancini calls it a "steel shim with a polymer coating" and Summit calls it a "flexible graphite core with a elastomer coating"
Mr. Gasket 1121G Mr. Gasket Head Gaskets | Summit Racing