
There is a Dogue de Bordeaux Club match on the 15th May, more details on the club site, this would be a good place to start looking, if you are not yet a club member you can join through the site as well Dogue de Bordeaux club of Great Britain, but I cannot do links.
I have Bordeaux and hip score, elbow x-ray, and eye test, heart testing is advisable also, make sure you find a reputable breeder as a lot of people are in it for the cash with no backup if things go wrong.