The model file is downloaded on MyMiniFactory with your account — that's how their catalog works. Download it and attach it to your order: the studio will print it and quote a price.
The creator allows printing this model for personal use only: prints can't be sold. The studio will print it for you personally.
Creator's license: Download - Share - Maintain License - Credit - Remix - Noncommercial
Creator's description
This Organ is just partly 3D printed, the rest is wood, felt, 25mm PVC pipes, screws (M3 and woodscrews), woodglue, 0.8mm steel wire, toothpicks and very small rubberbands for the valves, and a 500 sized RC Car Motor. That's the way I did it, but I suggest you to use bellows instead of the motor because the motor is pretty loud. I think the rest can be figured by looking at the photos and common sense.