I rarely see them on PF. You might try a google images search for "
phantom poodles for sale". Since you already know what health tested means for poodle (
like here), you can visit those sites and see the extent of any DNA testing. Embark also does these tests.
However I would first try the
United Poodle Association and use their
Member list. Many of them show their phantom and other multi-colored poodles in their conformation shows.
AKC does not allow phantoms or other multi-colored poodles in AKC shows.
Also on this thread specify if you're looking for a toy, mini or standard phantom, and what part of the country you prefer. Someone here may know of some breeders.
Good luck.