Hey. Instead of looking for commercial meat birds, go for a good dual purpose breed. They take longer to fatten but the meat is better. As someone else mentioned, try Bressé/ Gauloise or LaFleches. I understand Faveroles and Langshans are also good though those are breeds I've never raised. Try looking on ebay for hatching eggs. You are likely to find a much better range of breeds than looking for birds, especially if you search other countries.
You could also try looking for Sasso hybrids which are similar to Cobbs etc. Hope this helps.