I would look for breeders with Hooded, and pick out the ones with the most broken hoods.
You can also look fro black eyed white breeders, because a lot of them are actually hooded rats bred to have no markings, so they should have some throw-a-ways that are right up your alley. It's basically just an under-marked hooded. So to produce them, you would just find some broken hooded rats and breed the ones you like together.


If you're looking for show standard though, I can understand your finickiness.