Hello, Lee!
Is there a Fidonet archive (like the usenet one on deja.com)
where you could read old fidonet messages from 90s?
Yes.
Where can I get it?
Plug your device into The Wayback Machine and it will
take you right there.
If you mean the Wayback Machine website, for those interested, this is the best I could find:
https://web.archive.org/web/20190212110056/http://fidonet.ozzmosis.com/
Ghil.
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* Origin: Муравьиным спиртом советую натереть (2:5030/1081.117)