The one under the brake booster hose support bracket is missing but the assembly manual includes a note saying it's supposed to be there

Hello Ryan
I have a bunch of those and some of the plug wire looms let me know which ones you want and there yours

Thanks Lawrence, I'll take you up on one of those washers.

It'll give me an excuse to drop off that plastic antenna nut I've been saving for you.

Thanks to the others that replied too, but Lawrence's house is a stones throw from mine so that's the way to go.