Just looking over on Hobby Link Japan and they have the AFV Club M60A3 out as a pre order, not unexpected but still pretty quick for AFV Club to follow up the A2 with the A3, http://hlj.com/product/afvfv35249.

I saw that this morning while browsing. It was odd, but they showed the Material as resin, and call it a plastic model kit. Must be a translator glitch. And, no picture.