Speedometer gears to match 3.27 to 1 ratio axle gears?

[SSsssteamer]

I am installing 3.27 to 1 ratio axle gears into my 1931 model A pick up. My dilemma is that I haven't found anyone making speedometer drive gears to match up to my new 3.27 to one axle gears.
What have Ford Barners been doing to match up the model A speedometer to the 3.27 to one rear axle gears?
I have a balanced and very strong Model A touring motor from H & H so that I can pull these taller gears.