You are indeed right, the link to download the Open XML SDK 1.0 no longer works.
I just looked, and it appears that I don’t have the 1.0 DLLs at my fingertips. I probably have them in an old backup, but right now I am moving, and all my stuff is packed up. If you will check with me in a couple of weeks, I will be moved into my new office, and can look on my old backups.
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