It would help us to help you if we knew where you were located.
Here is a link for Siamese Rescue.
http://www.siameserescue.org/
They have several locations around the United States.
Do you have a photo of your cat that you could post here?
I would love to see her and someone else may see her and fall in love and want to adopt her.
I recently got two Siamese cats of my own so I know what wonderful cats they are.
Good luck in finding her a new home.