It's highly unlikely anyone on here is going to be able to recommend such a person, as you've probably already gathered.
The problem with these sort of crosses is that they are, in the vast majority of cases, bred by puppy farms, where the conditions for the dogs is a lifetime of being bred over and over whilst living in squalor.
Once the dogs or bitches are too old to breed they tend to be dumped or got rid of in some way - it isn't done humanly.
Many of the puppies coming from puppy farms will die pretty much as soon as the buyer gets them home.
If not bred at a puppy farm, it will be from a back yard breeder - someone breeding from their pet dog and whilst this type of breeder will likely be far kinder the dog is still coming from an unreliable background.
You are not going to find a proper responsible breeder of this sort of cross, or any crossbreed, in the main.
Hence people on the doghouse take a very dim view of people actively looking for dogs of this type, which is why you've had the response you've had.
You might not want negativity on your thread but tbh there's not a lot one can be positive about with these kind of breeders.