I'd be very happy if someone could help me to replace my beloved, supersmooth M-nib and section (that unfortunately had an accident which it didn't survive). I believe a 305 nib is the same thing, so one of these would be great, too.
Thanks for reading this,
Nellie

Thanks, everyone, for your very kind offers. I've found a nib: Univer is going to send me one.
Happy holiday and a Happy New Year to all of you!!
Nellie
(a shame I cannot just edit my original post)