I would like to replace the regular sidebar on the left, with a different sidebar for my 404 pages. For example, this page: http://www.recapo.com/ellen-degeneres-show/ellen-music/ellen-knaan-nelly-furtado-is-anybody-out-there-mp3-download/
The new sidebar needs to be exactly the same, but have no ads in it.
However, I want the regular sidebar that is already there to still be used on all of the other post pages, like it currently is.
I have granted support admin access to the website, in case that is helpful. Thanks for your help!