This is the plug De Vere use, as far as I know.
Regarding the carrier, the De Vere one is essentially two metal plates with nylon springs (not even really hinges) & clips for the glass - not a complicated thing to fabricate. I've been slowly assembling a bench-top 5108, but I'm going down a slightly different route for the carrier - mainly because I don't particularly care for the De Vere carrier design.
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