I had a friend make an awesome Saint Nicholas costume, for our school's Holly Fair, when I was the chairman of the event. We had "Pictures with Saint Nicholas", and folks loved having their kids' pictures taken in their Christmas outfits with the guys dressed in the costume. The man who was our first Saint Nicholas, back in 1992, was still doing it as of year before last. He loved it, because he let his gray beard grow nice and long, so he wouldn't have to wear the one that came with the costume. It looked wonderful!
I don't know the time frame of your production, but I could see about sending it to you to use. It would fit you perfectly, because the guy for whom it was made is about the same height and build! They use it the first weekend of December, and possibly, Jim might use it again during the Christmas pageant, at the Childrens Mass on Christmas Eve. a picture showing the costume. It goes all the way to the floor, and has a hood on the back of the cloak.