I've just found by myself a way to download firmware update file for Phaser 6200N/6200DP/6200DX.
Unfortunatelly going to provided link and filling all required fields results with opening following site:
But at this site I receive: "404 - The page you requested cannot be displayed."
P.S.It's also kind of strange to me that 6200B variant firmware seems to be still available:
That printer hasn't had a firmware update in 17 years,It went End Of Service in December 2011. I doubt the firmware could be found anymore. Your only chance would be the link I put above
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