Quote from calamity_unbound »It's kind of on the nose, but have you considered replacing them with the clue stones? They're 1 cmc higher across the board but you can at least ditch them to draw a card if need be.
Barrin, Master Wizard and Claws of Gix give you an effect for sacrificing any permanent while Slobad and Bosh give you a repeatable artifact sac outlet.
Throne of Geth could be useful if you're planning to sacrifice a lot of artifacts over the course of the game and Trading Post can be a swiss army knife.
Feel pretty silly for forgetting about the cluestones. But I think Trading Post or Slobad, Goblin Tinkerer are pretty much what I was looking for.