Lakers13 - all this will be very disappointing to you now that you are on the verge of getting your puppy but I hope you'll be taking this very well meaning advice.
I don't know this breeder and so wouldn't dream to make comment but of course these other resepctable breeders do and you've heard from others' experienes with dogs affected with Fanconi. I'm sure at this time of year you'll soon be able to find a healthy puppy form a genuine breeder.