The best place to buy is locally from Craigslist in your area. I can also find from Ebay if no other option is available.
Oklahoma Craigslist
https://geo.craigslist.org/iso/us/ok
To take all the monitor work out of it, here what I did and have been working great. I have Brinsea Octagon 20 with auto turner, no humility pump.
-Fill 1 reservoir with water when temperature < 70F, the humidity around 35-45%.
-Fill 2 reservoirs with water when temperature > 70F, the...
Yes, I agreed the Ixworth is hard to find. I was looking for White Cornish for awhile, but no luck and lucky enough to find 2 Ixworth roosters locally. They are from GreenFire Farms stock. The only issue that I have my Bresse hens are noisy than I would like and some hens are broody so not...
If you are plan to do taste test, it would be best divide into 2 groups; 1 with normal feed and the other special feed with milk. I feed my regular feed because don't have time and access to milk.
I have a block of White American Bresse around 2015, but not sure which line. They are little flighty and some make a lot noise when lay an egg or don't like other hen in the nest box. The rooster tend to follow and make noise with the hen. I am consider cross Ixworth rooster to the hen...
I read some folks get cross breed from them. Have you look on Craigslist? I am looking GreenFire Farms 2nd generation bloodline myself, but still no luck locally.
I have White Breese x Legbar cross before. The hen lay light blue egg and the breed little flighty. The meat taste ok, but the bird size is smaller than the pure White Bresse. I do like to cross White Breese X White Cornish (old timer cornish, not cornish X), but can't find cornish locally.
Those who live in Washington State. You can find a block of 3 hens and 1 rooster. https://seattle.craigslist.org/sno/grd/d/bresse-white-chickens/6586927471.html
Bresse is white bird, but you do get barring or ghosting feather from time to time. It seems little smaller than pure white. I forgotten and butch that one about a year ago. If you look about 15 pages back from this post, someone had one as well.
Here is an article about Bresse.
Bresse is best: How to eat the world's most expensive chicken
http://www.cnn.com/travel/article/bresse-chicken-france/index.html
Sorry for late response... the wet run condition in the last several weeks make it hard to capture photo. I purchased few PolyCarbonate Plastic Roof Panels recently and will fix the problem in March/April 2018.
I know there are questions about bloodline in the past. According the GreenFire auction, there are 2 bloodlines that imported from them. You can find the information in the auction here...