Thanks for the information- I can buy a new servo for a 1955-57 Ford Thunderbird that will fit nicely on the drivers side of my 11B. The ones that you all mention would work too, but I would like to be able to hold in my hand each one to see which one will fit best. The Thunderbird unit would be more easily available on this side of the pond. A 55-57 Thunderbird is a rather heavy car even though its a two-seater and does have a V8 engine. It might be too much for a Traction but I will look into it.
Larry Lewis