Fowl, I hear your pain in finding just the right pup. I've paid handsome prices for pups in the past, with exceptional lines, papers and health guarantee. Just because a litter has the ideal items your looking for, wont make the pup a hunter. Granted, your odds are better at having a great hunt companion, but, that's not in the guarantee, or should it be. I had two labs that were dumber than a sack of hammers from great lines. They didn't make it 6 months with me, they were off to a family that didn't hunt and they wanted a dog for the family.
One of my hunting partners back in the early 90's had a "OOP's" litter (12 pups) when his female wirehair pointer got out and his male lab knotted up to her. He was so pissed it was crazy. He literally was giving the pups away at 8 weeks old. I talked him into keeping one of them, which he did, and that "accident breading" pup was one of the best dogs I have ever been around. He was shocked and wish he hadn't have given them away. If I ever come across a litter of these pups, I just might have to pick one up.
Best of luck in the search, I'll keep my eyes and ears open for you.