what's a 'crown race washer'?

if you meant 'keyed washer' those are pretty easy, just get one the same size 1" or 1.1/8"
https://www.amazon.com/Sunlite-Heads.../dp/B000AO5KYW

if you mean 'crown race' ... well you're in more trouble.

and who takes the crown race off when packing a bike anyway? you probably meant the former...

or maybe you meant something totally different, for lack of correct parts vocabulary.... who knows