Part of the problem is who owns the After Dark trademarks and/or code. I'm certain Activision owns the former, not sure on the latter. If anyone has the source code, I wouldn't mind trying to recreate a few screen savers with my marginal programming skills.Bring back the flying toasters screen saver, THEN we'll talk.
There is a Quartz screen saver out there. Here is a link to an archived version.