Speedometer Gears

If you're going to the Nats there is always a guy in the same place that sells them. I think they're all the same price at something like $15.00. He has bins of them and has a chart there to cross-reference them so the less informed can figure out which one they need. He is always right inside the back entrance, Gate H off of Refugee Rd. I should stock up on all sizes if they're getting that hard to find!!! Geof