Union mount options in Fedora

I've grown up a Debian/Ubuntu guy and I'm learning Fedora by trying to recreate the services my Ubuntu trusty box currently provides. However, I'm trying to recreate a union mount and don't see any obvious way to do it. Each user on my Ubuntu-based server has a "media" folder, with subfolders for movies, music, etc. Using aufs-tools, I create a (read-only) union mount of userA...userZ's "media" folders at /srv/media. Then using Samba, my Plex box can access that combined media folder over the network. It appears nothing reasonably resembling aufs-tools is available via the standard repos (nor via rpmfusion). I've seen some mentions online of UnionFS, but I also saw something about it having fallen out of favor. I don't want to use FUSE, because this union mount is based on several users' media folders. What's the preferred solution for creating union mounts on Fedora/RHEL/CentOS servers these days?