So very so to hear of the loss of the chicks. I got a shipment of ducks four or five years ago from Sandhill and most of them were dead on arrival. It just hurts bad to see the little ones like that. On a lighter note, I have gotten several other shipments from Sandhill and the chicks have been in perfect condition. It sounds as if someone in the postal service was careless and/or clueless and left the chicks on a hot dock. This certainly should not have happened.
I just picked up chicks this morning that were shipped from a fellow BYC member located in NY. The chicks were mailed on Wednesday express mail. All chicks arrived alive and with a couple being a little droopy but after some water, food, and a warm brooder they are well. I also try to pick chicks up at the main hub in Colorado Springs if possible but these chicks didn't get to the hub until around Midnight last night.
Sandhill is good about trying to get you replacements or giving you a refund or a voucher for chicks in the future. The bad thing is Sandhill generally sell out of the popular breeds early in the season so they may not be able to replace some of the breeds you wanted.
There are a number of BYC member that sell chicks in Colorado. Maybe some of them will have the breeds you a looking for. Good luck to you.