ebay ???
http://media.photobucket.com/image/b...3/P1010029.jpg
think u can`t buy ebay might have note below reply.
master socket u can.
http://www.telephonesuk.co.uk/images/NTE5_BT_rear.jpg
take the screw on and the thing that come of u can play with . if u play with the dark and light blue wires bt will send u a bill.
is it a master box