I looked at the import requirements, and they’re actually not too bad for most plants (peaches may have some extra restrictions). Basically, you need to have it mailed to inspectors at a pot of entry, who then forward it to you. Then you just need to keep them 10’ away from other plants for 2 years and be willing to be inspected, and report if any die.
@Arhus76 if you let us know what those PCNA hybrids are, there are many people who would be interested in importing them legally