Rapps got a shipment of F0 Amph's from "San Francisco Libre, Lago Managua" 2-3 years ago. There were some "Red Barred Midas" available for a short time. I got one and it turned out to be a female. I wish I'd bought 10 of 'em and got a breeding pair. After those all sold out, he started offering these "Gold Barred" Midas.
They come from a certain area of the lake, these color fish are only seen in that area. Search on here for "Red Barred Midas", or "san francisco libre", and you can see Rapps and RD's discussion of these fish.
These are very cool fish. They look great.