It took a month*, but I finally got my KYB rear shocks for the F150. I was surprised to see a "Made in Japan" sticker on the shock.
*The KYBs I ordered from Amazon for the front came within a couple of days. I ordered KYBs for the rear at the same time, but I kept on getting delayed shipping notices. I finally got tired of the waiting, cancelled the order, and ordered the rear KYBs from Rock Auto.