
Even if there are no Parson litters listed on here at the moment, there are a lot of breeders who may know of a litter with puppies available. Perhaps they have used their stud dogs.
You may have to wait - be on a list as things are still difficult re finding puppies from reputable breeders. You might contact the relevant Breed Club for names of known reputable breeders.
Good luck!
PS I just had a quick look on Pets4 and there are 20+ PJR litters on there at varying prices, BUT be careful as many, if not most breeders who have to advertise there may well not be top quality breeders. See how many names are also PJR Breed Club members. And even then, if when you go visit, you don't get the right vibes, move on.