One more bump.
Just a quick update...
I contacted Siamese Rescue in hopes that they might be able to help. Unfortunately they don't have a real presence in this area, but they WILL (for a small donation) add the cats to a mailing that they send out several times a week. I've only put Cleo there for now as she'd likely to be the hardest to place. Whether anyone in my area will see it, I don't know, but I hope so. They also suggested that I put ads up at the vet and so forth, but I'm not super hopeful there...which is why I started the thread.
I'm aware that there aren't many people of ANY kind within my area. It's one of the reasons I'm relocating.
Thanks for the help and the tips and good thoughts everyone has provided so far!