Found 5 alternatives for 1377391-4 by TE Connectivity AMP Connectors. Backplane Connectors Din 41612 — Bulk,Tray.
CONN DIN PLUG 64POS PCB RA GOLD
CONN DIN RCPT 48POS PNL MNT GOLD
RP618 / 622
CONN DIN RCPT 96POS PCB