I have the valve sockets for you, the only difference is that the B7 one is one piece moulded bakelite (i.e. does not have a metal mounting ring), the others are as per Bruce's photograph.
Octal plug is proving difficult - I've found chassis-mount ones (like a reverse valve socket) both with and without the metal mounting plate, but not a cable mounting type.
There's also the WS 52 connector - you'll need a thin 1/4" AF socket to remove the nuts holding the contact springs. (o.d. less than 0.38" to clear the recesses in the socket.)
I'll see if I can get them in the post tomorrow.
Chris.
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