On the top of the Model A discussion list there is a thread called Model A/AA Ford Websites...Can YOU add to the list?" It has reader recommended vendors of all sorts. Here is the list on Speedos,
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 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)