Incantation of Summoning the Dead requires that you be on the spot where the person died, or that you have the corpse, and it is an Arcane Connection range spell. It doesn't make any sense to me that a version of the same spell with lower range should be more powerful-- if you can stand on the spot where they died and cast it at a lv40 spell, it makes no sense that it should be easier to cast the same spell from further away. Hermetically, you can't use magic to affect something you cannot perceive, so conjuring up a ghost requires an Arcane Connection.
Also, don't forget that summoning a ghost is always a ritual.
That said, Sophia has probably mentioned her pater was excellent with ghosts, and there's probably a lab text of Incantation of Summoning the Dead in his lab somewhere, if only she had some way to see in there she could probably find it for you.
Sinmore or Attravere may have mentioned at some point that they met a little girl who claims to be able to see ghosts...