I do this as well, I use the large crates for individual male housing on occasion as well, even breeding pens for smaller bantams. Also are great "conditioning" pens in the week before the show after birds have been washed. Lots of uses for dog crates.
Dragonlady in this thread has some of the best Orpingtons you'll find anywhere. You could also attend local shows in your area to connect with breeders. If you go to the American Poultry Association site there is a list of officers and district directors, find the one for your area and contact them about why shows can be found, or even if they know any good breeders (I always prefer to make the connections myself in person).