You need at least one EP to let the fences appear in your game; the 'Familiar Fencing' fence needs OfB because the one basegame modular fence somehow wouldn't work on the corresponding Sims 3 mesh, requiring me to clone a fence from another EP.
I also converted the 'Playground Fence', but forgot about it until I uploaded the files to Mediafire, and then lacked the inspiration to take another screenshot. You can take a look at it here: http://wiki.thesimsresource.com/index.php?title=Fences
Download here: http://www.mediafire.com/?pblbkv3d4736kc6
References from top to bottom: Iron Man (athlete), Iron Man (Marvel comic), iron scissors, iron pan, Iron Lady (Margaret Thatcher), iron bars (T-1000,Terminator2)