I only know of two brand-nonspecific ones.
SGC makes one, and LDG Electronics makes another one. If I'm not very
much mistaken, the LDG one is cheaper--$239 fully assembled for the
150-watt version.
--
Buddy Brannan, KB5ELV/3 | "And if the ground yawned,
Phone: (814) 455-7333 | I'd step to the side and say,
Email: [log in to unmask] | "Hey ground! I'm nobody's lunch!"
http://www.ycardz.com/ | --Eddie From Ohio