There is a typo: It should be ItaRive.zip where there is only ItaRive
Created attachment 75742 [details] corrected sword-modules-20041209.ebuild
But I hope someone can fixe the typo, before a maintainer is found. Just add the ".zip" on the respective line. This package won't have spectacular updates anyway... so there is no urgent need for a maintainer.
fixed in portage.