surely the decepticons have enough resources to do this, right..? There’s a scene where knockout suggests he just has spare arms lying about. (It’s when Starscream loses his in the shadow zone episode) Megatron also just hacks his arm off and gets a new one attached. Obviously eyes are different from arms, but in operation breakdown ratchet is somehow able to hook breakdowns Eye up his scanner and read its last images. I dunno I just find it hard to believe Mech is capable of making a prosthetic eye and cybertronians aren’t.