Up for sale here is this vintage used McMurdo octal (8-pin) black Bakelite (or plastic) tube socket with hardware.  This is in very good condition with just a little light wear.  The socket's terminals have solder and wire bits attached to them.  Supposedly these were used on Marshall tube amps, though I don't know for sure.  This is a really nice socket and is guaranteed to work for you.  Please see my pictures for details.

US shipping and handling is $4, and international is $12.  I accept Paypal.  If you have any questions, please ask.

I have a number of other sockets, Magic cards, and vintage electronics listed--feel free to take a look!