I landed a unicorn! Busy work day for me, but pretty crazy update:
I had previously been matched to a Plaid Black/Black/Wood/21" on the way, but because I'm the persistent type, I kept calling around to see if stores in in Illinois had the exact configuration I was looking for. Just today a store near Chicago had a Plaid Black/White/Wood/21" up for grabs because the person who ordered it will be overseas next week and cannot take delivery before EOQ.
They pinged and the car was near Salt Lake City, destined for delivery on the 28th. More excited than ever now!