NAVMAN missing audio .sfs files

Hello,

I have just joined this forum.

I have a Navman F610 Tourer Life Model No:N381-5000

It works fine apart from the speech audio files are missing.
I have installed NavDesk 7.50 and cannot do anything with that, I have used AI help but can't get the audio files which are a format called .sfs
Typically named:

Navman\Voice\
EnglishUK_Female.sfs
EnglishUK_Male.sfs
EnglishAU_Karen.sfs
EnglishUS_Samantha.sfs

So if anyone has any Navman of any kind; these files should be in the Navman itself when you hook it up to a computer and look in the files through windows...

I have another Navman myself but I cannot find it and think I leant it to my brother some miles away.
I have the CD ROM for it but no .sfs files are present.
AI says to get hold of that Navman to get into the files within it and copy over those files.

I'll do that one day but for now I really need to have someone helpful in sourcing those files please?

At this stage I do not care what voice it is, I'd settle with Yoda rather than nothing!