>>5961856For figures that small, Revoltech and Hobby Base joints will be kinda big but are suitable for major areas of articulation with enough mass (knees, shoulders, hips, etc). Narrower areas like wrists, elbows, and ankles are another thing. I do have some 5mm ball joints that I was going to put up on my Shapeways store today, if you're interested. They're ball-and-socket joints that attached have a joint diameter of 4.9mm, just a hair bigger than figma wrists but work for small figure joints for narrow parts. Mind you, you'll need to drill out 2mm or 5/64" holes to attach the joints' pegs.
Look up 'The God Fodder' on Shapeways today. Should be ready by 12pm EST.