Dog / Cat placental cell lines?

[John Nelson]

The Laboratory that I am doing my graduate work in is looking for a dog
or cat placental cell line to compare to our human BeWo (human placental trophoblast cell line)
cells.  Problem is that we are having a tough time locating one.  Are we
looking for a cell line that does not exist?  If so we will have to go to
an SV40 transformation.

Thanks to anyone that replies.