In general the US is not great with retropug breeding. The AKC is a perpetrator of brachycephaly. In the US there are some cross bred mutt retropugs though. The most serious purebred retropugs (look up retromops, you'll get more hits) are primarily from Germany, Denmark, and Sweden. Some breeders will even deliver them to you. Therese Rodin is one of the more vocal advocates and she can help you. She has even made a few recommendations for one off breeders in the US. Supporting a true retromop breeder is a great thing, but it will be an expensive endeavor from the US. There are some pug rescues though - not a lot, but they exist. This will likely lead to a more traditional pug but you're not directly supporting a bad breeder, you're just helping out an animal that was the victim of irresponsible breeding and that's an honorable thing. True retromops with nice healthy snouts tend to be quite active and while they will lounge around your place, they'll also need a lot more regular exercise than a sleepy AKC standard pug. Pugs are amazing dogs, ever day you can come home to an animal that will act like he's seeing his very best friend after being apart for years. If you are looking at breeders, ask about the BOAS scoring of the dog's parents - you want 0 or 1 and you'll want to look at the parents with mature snouts and make sure they don't look too flat-faced. The snout on the puppy is usually pretty obvious as well.