Unless the code is elsewhere on the disk (and thats a big if!), then its lost I'm afraid.
Actually the loader for the second part was NOT removed from the first part.
Maybe you can locate it and by dis-assembling it you should figure out were the tracks are supposed to be.
Or maybe the code of the second part is pre-loaded by the first part and only the chip-tune was to be loaded when you activate the key-trigger?
These are the last options.
In my opinion, as track 58 contain only a part
of the Protracker player, I think the code of the part 2 was supposed to lie on front of this track.
But as you noticed, those tracks are empty.
Anyway, thank you very much for taking time to analyse this part.