This gasket is from a regular customer who collects and restores old Lauson engines. He always order the same Armstrong metal clad material, and does not require a steel flame ring. Although not the preferred method, he sent a tracing by snail mail:
We used that tracing to cut 3 of these from a 1.2mm thick Armstrong metal clad material, which we more often use for exhaust gaskets. We have an even better version of this in 1.8mm as well and I will be posting some images of some exhaust gaskets made from that. Here is one of the finished Lauson gaskets:
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