I am surveying the Hexbeam antenna market. For the moment, I've found:
http://www.eantenna.es/?page_id=3146 (acquired by Wimo)
http://www.k4hex.com/ (NA4RR, same design as di K4KIO with different baseplate)
http://www.radiowavz.com/ (with one more wire that works as wide band antenna to cover 160 m band...)
The Spiderbeam is different and I don't consider it within this category, for the moment.
Source: search engines on internet with keyword "hexbeam".