On the top of this forum there is a link;
Model A/AA Ford Websites...Can YOU add to the list?"
It has a list of Fordbarn member recommendations for Model A stuff. Here is the Speedometer section;
SPEEDOMETERS
1.
www.cushmanspeedometer.com (Chris) Cushman Corporation Speedometer Repair (Kansas)
2. No known website: Chuck Bertschi (972)-231-5019 (Texas)
3. No known website: Harry Warburton (252)-258-1530/(252)-752-4098 (N. Carolina)
4. No known website: Bills Speedo Shop (937)-492-7800 (Ohio)
5. No known website: Norm's Antique Auto Supply (563)-322-8388 or (563)-320-2096 (Iowa)
Steve Plucker keeps up this list with all the other stuff he does it would not surprise me if he has missed a couple.