11g SQL Performance Analyzer backport to 10g?

My Question:
In the context of 9i -> 10g upgrade and to deal with perfomance issues, would be good to have this tool available as well. I understood it's PL/SQL so, was wondering if anybody has knowledge of it being requested for back-port or even if back-ported already?

Given the amount of infrastructure required to support it my guess is that it isn't going to happen. But then I thought the same thing about Streams.
What prevents you from using it in 11g while running production in 10gR2?

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    >
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    >
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    user626582 wrote:
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