Disney Canon

Unknown. Certainly none are seen on screen in any of the theatrical films, novelisations, TV Series or canon comics. It's certainlytheoretically possible (cloning and holographic technology are definitely a 'thing' and his outfit should be pretty easy to replicate) but there's no indication that the rebellion or the Empire ever tried it.

EU Canon

Yes, kinda. There was a Vader clone seen in "Galaxy of Fear : Clones", a young-reader novel. I won't spoil the plot but as you can see from the book cover, the real Vader doesn't take kindly to finding out.