Try other places. I went to one of my regular ACE Hardwares today and was told that they would sell as few as two chicks to keep each other company.Something that worked for me with silver laced victims was picking the darkest chicks. The adult males have vastly more white them the females.
I think it may work for silver laced Wyandotte too.
Try other feed stores, Agway etc. TSC can't be the only game in town, even if it means you have to drive a little distance and see the selection that others have.
Some of the hatcheries are allowing for small orders now, and even MyPetChicken will accept a minimum of three, and they ship fast for the date that you specify.