Moved from Blogger – 'archive' pages in search result in 404 errors

Hi everyone, I recently moved over from a custom Blogger install to hosted WordPress (under the same url – http://www.londoneer.org). I’ve installed a 404 error page catcher and modifier, and it seems that all the old search listings which point to an ‘archive’ page under the old Blogger structure result in a 404 error page when they get to the new site. An example is:

http://www.londoneer.org/2010_09_01_archive.html
or
http://www.londoneer.org/2010_07_01_archive.html

Is there a way I can create an archive structure in WordPress which looks like this, and then map 301 redirects onto them as necessary?