With 16,000 Twenty Two's made you would think it wouldn't be hard to find a decent used set in the USA Neil, sadly, it's probably cheaper to buy a complete machine for $800 - $1,000 and rat the parts you need off that, the same issue I'm facing when looking for good used manifolds and carbs to suit my 10, and 8C20 / 15 tractors, though at least Rosewood make new manifolds for the 10 and 15, hopefully Byron and Les get around to making new Ensign carbs.