Bearpaw.. If nothing else you are persistant. Pigeons, and Exotic Birds are imported on a regular basis. In fact there are brokers for pigeons who will buy and ship for you. All these birds have to come into an approved USDA Quarantine Facility and are held for a minimum of 30 days. Cost per day is between $2.00 and $5.00 per bird. The one I know the most about is the one in Los Angeles. Here's a phone # for the USDA person at that Quarantine Station 310-725-1970. It may not be current as it has been a couple of years since I spoke to them, but someone should give you the lowdown on how to get some birds into the USA.
I'm curious? Why the big push to get birds from the UK? The Araucana Standards there are not the same as ours and you would be breeding out defects to meet the US standard. This is a big country. The genetic diversity here is probaly greater and surely much easier to obtain.