Good ammeters are out there, just not new manufactured stock. I found a couple on ebay. I think I paid around $20.00 each but they are accurate dependable, and of good quality. What you want is the D'arsonval type movement in the gauge.
Buy from Dan Bixby. He on,t carries originals.
How do we contact Dan?? Just did a google search and didn't come up with anything. Would like to talk with him
I can find good vintage ammeters pretty easily on ebay, but they don't fit in the small space of the A instrument panel, and/or they don't look authentic.
Growley- are you finding good quality authentic looking meters? Could you please post a photo?