Unfortunately not a plugin, more an alternative to WaveLab, but yes, this does the job. You can demo the full functionality for 10 days. On certain material it is astonishingly good, but bear in mind it is intended primarily for rebalancing rather than perfect isolation, which it nevertheless can do really well, albeit with artifacts. You’ll need at least RX 7 Standard – pricey if you’re just looking for that one funtion though!
If you’re in that price range, you should also try Melodyne, but that has quite a learning curve when you want to do more than just straight-forward pitch correction or note seperation. It is nevertheless time well invested and a skill that has many more uses.