I got email from a fellow who got a 128700 torn feed hole stop assembly for a M14 TD. It was in a batch of guitar amp tubes he bought. NOS. He doesn’t have any use for it. 
Info at
https://www.navy-radio.com/manuals/tty/jh/ttyman6/specs/5741S_Iss5.pdf

Contact Lawrence at 
woogierocks84@gmail.com


Nick England K4NYW
www.navy-radio.com