It turns out that Stanley Assembly Technologies (pdf) produces a whole line of articulated arms. While the bright orange color may have to be updated with a custom paint job to suit any degree of aesthetic standard, they can't be faulted on the range of their reach and payload specs. They also give an idea of what kind of mechanical/aesthetic compromises (eg: exposed/leveraged gas shock cylinder) a potential consumer arm manufacturer would have to consider if in future they chose to expand their product line.
Outstanding, bobob. It is of course an aesthetic abomination, but I'm sure with a bit of creativity it can acquire a charm all its own. When one day I finally build the house designed by myself that I've always wanted, I will keep in mind Stanley Assembly Technologies for my articulated arm needs.