Found 4 alternatives for LDT-A512RI by Lumex Opto/Components Inc.. Display Modules Led Character And Numeric — 28-DIP (0.600", 15.24mm).
DISPLAY 7SEG 0.56" TRP RED 28DIP
DISPLAY 7SEG 0.56" TRP RED 28DIP
DISPLAY 7SEG 0.56" TRP RED 28DIP
DISPLAY 7SEG 0.56" TRP GRN 28DIP