We have the Construct Builders Guidebook coming this November. I would love it if we could get a feat or archetype that could apply construct augments. The frame work is there with flesh crafting and would be a fun variant for non evil PCs. An Alchemist themed one where you can graft construct limbs would be very thematic for discoveries such as extra arms. Or better yet a prestige class that slowly augments you into being half construct.