A-arm mounting tab washers

Does anyone know a supplier for the hardened washers (besides Racer Tech) that one would weld to the a-arm mounting tabs when they get egged-out? RT is out and shows backorder. I didn’t see any on SATV or RMATV web sites. Can someone point me in the right direction? I would really like to use the hardened washers instead of running up to the local hardware store and grabbing something off the shelf. Or maybe there is another option thru Mcmaster/Carr? Please advise if you get the chance.

Thanks