Red Head here in Auburn, WA has done a couple for me. Last one was a rebuild of my '65 Ford Galaxie w/factory Saginaw steering box (they used FoMoCo and Saginaw units that year). Rebuilt as a faster ratio unit for no extra charge, works great.
https://redheadsteeringgears.com Make sure you tell them to leave it unpainted or single color, otherwise they tend to do their black/red thing.