RE: servo linkages
Not as far as I know, at the moment I am on my laptop in the South of France, until I get back to my Desktop I am unable to post links to these product, but what you can do is look up "Conrad Electronics" they have the ali ball links in both 3mm x 3mm and 3mm x 2mm, 3mm push rods can be obtained from any LHS, the dual servo horns and surace horns are from a German company who's name I can't remember at the moment, but will try to find a link.
Mike