Though Mr. Nice sells a version of it too, I believe that @Fitzera got that specific cross of the clone to the Shanti Mango from Wally Duck (AKA Donald Mallard) from Down Under, Mr. Duckfoot himself.
This is the Mr Nice seeds: Neville's Haze Mango (Neville's Haze x Mango) - Mr. Nice seedbank and research - Strains