How can Plex show scanned pictures in the proper order of numbered pictures?

Hi, I tried to solve it before - but nobody seems to understand the BIG problem Plex shows for me.
Situation: All scanned pictures are numbered like e.g. N1-1, N1-2, N1-3…N1-9, N1-10, N1-11, etc. All my photo softwares, cloud services etc show them in this exact order - which is absolutel necessary to be able to follow a story. PLEX, however has only a sorting algorithm by date, name etc BUT NOT by numbers. All I see (in this example) is N1-1, N10, N1-11,…N1-19, N1-2, N1-3… This is so aggrevating that (my favorite) PLEX cannot handle this. With over 10000 scanned pictures there were suggestions to change the numbering of the scanned pictures. I tried something like N1-0001, N1-0002 - but SOS. Wish PLEX had a hotline to fix this problem. Any help is highly appreciated.
Heinz