Im not aware of it. You could create one, doing something for ports wouldnt be difficult, it just wont be official off the bat. However, something to consider. They may not offer it because it is something the project does not want/need? I'm not speaking for the FreeBSD project, but it could be a case of Debian. Debian does not offer this because Debian has a pretty exhaustive quality control policy over packages that make it into the repo. I only mention this because it is something I saw a lot in the linux community that rather ticked me off. Random distribution has their reasons for their design choices, don't shoe horn every distro/OS to having features you want or feature parity with other distros/os have. Some OS's dont make it a goal to offer everything under the sun. Sometimes it is a manpower problem. Sometimes like with Debian, it is an engineering design decision.
Best thing would be to ask in the mailing list. If there is none, see if some are interested in starting something and see if FreeBSD wants to give it the official stamp of approval. If not, you can always offer it as an unofficial ports tree.