Yes they are uncommon. All I can recommend is continue searching the rest of the connector makers. Assuming TE hasn't gobbled them up too.

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From memory there is Bendix, King, ?Duechen?, AMP, Litton.
Likely you will need to utilize second source. The big connector makers don't support uncommon connectors for very long. With no mention of an engraved part number on the bezel it was likely a custom connector, making things even worse.
You may need to resort to utilizing something close that can be altered to your purpose.
Not much help but that is I have for you right now.
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