Does anyone use these anymore?....

Was down at the local speed shop. (Used to work for him,). He does a lot of B/RB and Chev Rat builds. Started digging in the back inventory room. Found a crusty Victor head set box. Had steel shim head gaskets,with 6 bolt holes per cylinder.Found a part number,crossed it. Pointed to 64/65 OEM Hemi steel shim head gaskets. Does anyone even use this stuff anymore?