On kde-loog a unofficial port of dekorator for kde 4 can be found. To test this, I created an ebuild. Not all themes are currently working with this version of dekorator.
Created attachment 182259 [details] dekorator 0.4.0.2 ebuild Changed the category to x11-themes as this seems more suitable to me
Seems to be a version bump to x11-misc/dekorator to me. Assigning accordingly.
The ebuild works perfectly, I think it can be included in the tree. Thanks for the effort Andy. :)
x11-misc/dekorator masked latest x11-themes/dekorator in portage