.. well to be fair, if it is a 301, it IS labeled Permanent ..
/ducking for cover <grin>

One old trick for this is to dis-associate the Null record to the website in the Bindings (thus causing an error) and then tell that error message (for that site) to redirect to the correct URL. It ain't pretty, but it appears seamless to the user.
Soon they cache or bookmark the correct URL and this 'fix/hack' is needed less and less.

//Can you guess what I do for a living?


Make your sound your own!
.. I do not work here, but the benefits are still awesome