It is certainly in Bali dress, but i am not convinced that the blade is Balinese. It looks more Javanese to my eyes.
I agree that the sarong is older while the hilt(s) and the uwer are new. Nothing wrong with that.
Your Bali hilt is no great piece of carving, but it has a nice expression IMO. I like it. An older hilt wouldn't necessarily be all that different. There are countless styles of Bali hilts.