[TYPO3-english] Multiple 404 error handlers for multi-domain web-sites

[Victor Livakovsky]

Hello, list.

Maybe I'm too stupid, but can't find anything for such (as I assume) 
popular question.
I have 3 domains in my web and I need individual error page (with 
sitemap) for each domain, but I can specify only one value here:
$TYPO3_CONF_VARS['FE']['pageNotFound_handling']

And it will work only for that domain, where page with specified id 
exists. For other two domains I'll get "ID was outside the domain" error.

How can I specify individual 404 error page for each domain?

Thank you in advance. And sorry, if this question is in the list archive 
- I can't find anything :(