Wanted BNC front panel 'Y' input socket Tec 2445 sope

looking for qty 1 off , input socket for tectronix scope , socket
has
insulated outer ring that the contact pin on the probe earths to ,
changing the range by x10


part number on socket , [S] 24931-28jr270-1


same socket is fitted to ch 1, 2 , 3 , and 4 'Y' inputs , held in
place by pinch grub screw


Tnx - Graham .. -