Atlantic Models in Miami. They make custom and semi-custom big ones - from presentation-for-retirement to on-a-pedestal-by-your-parking-lot. Family company (The Jarmans), terrific people, in business since 1982. If they already have the mold, could be affordable.

Atlantic-Models, Inc. - Home

They also have a sales room for The Airplane Shop, but every time I've looked for something specific, it's out of stock in Miami. They're the largest source in the US (world?), own SkyMarks, and also nice people. HQ & salesroom: New Jersey, another sales room in Las Vegas. Can be far more affordable, huge selection in NJ & on-line. www.AirplaneShop.Com