Response redirection in GIOP/IIOP

Sounds like the perfect job for the Stream feature. You can use a Profile or an iRule to do this, specifying the wrong hostname as the search string and the correct one as the replacement string. I'd got for the iRule myself. Strangely I can't find an example that doesn't use HTTP nor any details on what events might be valid. However, my VE certainly accepts this;

You must assign a Stream profile (with no source or target strings 
specified) to the Virtual Server before you can use this iRule
Escape periods with a backslash where possible

The stream expression must always come before stream is enabled

when CLIENT_DATA {
 We don’t want to rewrite requests, only responses
 STREAM::disable
}

when SERVER_DATA {
  Search for instances of wronghost and replace with righthost
 @ Is a delimiter at the start and end of each string
 STREAM::expression {@wronghost@righthost@}

 Apply and rewrite response data
 STREAM::enable
}