[PrinzMegaherz]

It's an interesting idea, but AFAIK, the game presently does not support the "curing" of afflictions by adding magical items

Well, that was not my intention. The replacement part should not cure the affliction, but give new abilities similar to those magical eyes. As an example, I would introduce the sword arm. Basically an average Sword weapon which negates the affect of lost arm and adds some strength.
Another thing I thought of would be the "Stinger", basically the manticores sting attack or whatever it is called.

Like the eyes, those parts should be placed in the misc slot. And like the eyes, a commander with both arms who gets an mechanical arm attached should lose one arm as affliction.