I found a place where you can download a 64-bit binary, but it's a development version taken directly from the latest build of the master branch (so no stability guarantees, changelog is here). http://build-eu-00.elastic.co/view/Beats/job/beats-package/ws/src/github.com/elastic/beats/dev-tools/packer/build/
The workspace containing the binaries gets deleted when a new build starts.