EDIT: the PASS server is not working
All problems solved, thanks.
What I was trying to say was that I could not d/l apt-sources-list as it was not on the pass server. But as I had overwritten my original sources.list with the PASS sources.list, I needed a sources.list (or a repo) from somewhere so I could get to a public repo to d/l apt-sources-list.
Once I had changed (after backing up of course) my sources.list following djohnston's hint, I could update from a public mirror and d/l apt-sources-list. So now, Synaptic is set to a public mirror (etz.debian.ch iirc) and after running a full update (which wasn't big as I only needed what had not gone to the PASS server) I installed apt-sources-list which did what it is supposed to:
During installation, your old sources list will be created as an rpmsave file.
I just couldn't get where I needed to go to d/l apt-sources-list as I had lost (or better thrown away) the "key" (public mirrors). To make it all worse, I had posted back before following djohnston's advice and have created a mess as it seems. Not only was the thread hijacked, but a lot of confusion was created. My bad, sorry for that.
Should have searched better maybe before posting anything.
Now, all is fine. Thank you once again Neal, keep up the good work!
EDIT 2: Had I been thinking after reading the first post of this thread I might have figured out myself what to do next.... Oh boy, noob error .....