Go back and read post #15 by S'mise. The thread could have ended there. OP asked and #15 answered.Holes are too big, screws are in the wrong position. I saw that one too.-Hal
The chosen answer is using an available 3 gang decora brushed nickel plate (with three step edge) and blank decora inserts, field drilled and spray painted. The plates that Sameguy links to look to be a good match, and, when you look at the other choices available in that style, at Sameguy's link, you will find a 3 gang decora. . . FWIW. But S'mise said he already has that decora plate.