I have been, since reading it some years ago, persuaded that there was never a Retail OS 9.2.2 CD, although Retail OS 9.2.1 certainly exists as [Z-]691-3334-A. This is not a terminal impasse, however, for both 9.2.x Updates are available for download:

http://docs.info.apple.com/article.html?artnum=120030

http://docs.info.apple.com/article.html?artnum=75186

and Retail OS 9.1 is still readily available.

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