They were in the Asian Plains were they not? I think by the time I remember seeing them, they just had a couple left in the collection, displayed at the zoo.
I know this is quite old, but my word! You are amazingly lucky! I would do anything to get to see a Saiga. I wish that some more would be brought to the United States. Though that is highly unlikely as far as I know they are only currently kept in the Moscow Zoo. Did SD have any luck breeding them?