With the construct essence feat you are partway there. You gain 50% healing from repair spells and devine healing gets reduced by 25%.
Self-Forged is a prestige in PnP too. You pretty much cut off your arm and replace it with a robotic one. The arm counts as a Heavy mace (I think it was) dealing 1d8+str dmg.
They also allowed you to equip WF only parts like Docents.
In PnP you have of course much more freedom of Thought when it comes to crafting of magical items and the parts ou could add over time. Here I just hope to see them continue the featline for "Self-Forged" as a feat line and then make the Battle engineer progress further than it currently is as a prestige class.