Our feed store does special orders. They have a list of about 20 breeds to choose from. It was like shopping for chicks! They didn't charge extra either for the chicks nor for shipping.Not sure about TSC but doesn't hurt to check with your feed store (TSC or not) if they do take special orders. Some places will simply add it to the orders they already have scheduled so your chicks will come with all the others they order. I don't know if there's any actual cost savings (maybe in shipping) but this way the employees will receive the order so no chasing around the postal service yourself.
Last time I was at my local feed store to get chicks they had one whole bin reserved, it was someone's special order awaiting pick up.