Check this out. http://www.promodeler.com
Very close in size to the popular JR 8411 and 8611, but much stronger in all ways.
I have one of their 470 in. oz. high voltage servos and will get more....they are a quality piece. Made locally in.cenral Florida. So far my only criticism is that they use a Futaba spline instead of JR........not a big deal, but I would prefer to keep only one brand of servo arm in stock.