Here is source of LFN filebrowser for Divide/DivMMC from Dr.Slump. Author have no time.
https://github.com/dr-slump-0/esxDOS-NMI-Navigator
Versions 18 and 19 may run also on Divide with 32kB sram, only version 20 use more ram pages on DivMMC 128/512kB.