I don't care how Ralph found the HII, as long as it's not in the hands of Russell or one of his 'girls'. Personally, I think it's great that Ralph didn't replace it with a fake. Now when Russell goes to get it and sees it gone, he's going to assume that one of his 'girls' has it* and will probably accuse them of keeping it from him. I'm hoping it will bring down that alliance.
*Remember Russell thinks only he and the ladies know where the idol could be. After all they are the only ones who read the clue and in Russell's eyes no one is smart enough (or lucky enough) to find an idol without a clue except him.