O'Reilly and Autozone both carry Motormite (Help!) products.
If you can't break through their mental fog any other way, ask for Motormite #03112. It's 3 2-1/2" studs (3/8-16), 3 brass nuts and 3 lockwashers. That's one more than you need, but it will get you out of the store with your parts. If you're using the donut gaskets, you might need #03113, which is the same kit with 3-1/4" studs.
regards,
Leon
