There are plenty of imports around.
I don't mean any of what I'm about to say to be rude or make assumptions about your abilities as a keeper, but I am going to say what I think about the species.
Look at why you want parsons long and hard. It isn't a species that anyone should be keeping without an intention to breed them. They are not pets and that statement is perhaps most true for this species in that they really don't care for human interaction much.
They are also perhaps the most challenging species I've ever kept. Some will argue and say that there are harder species and that parsons are not so hard, but I can tell you that they require more water, more precise attention to detail, and a lot more time than the melleri I kept years ago and melleri have a horrible reputation for thriving in captivity.
My experiences were very different between Wild Caught animals and Captive Bred animals. The CB animals were trouble free, but my Wild Caught pair has been a real guessing game and there isn't a ready to follow plan of care, only anecdotes from keepers. Everything is tailored to the individual chameleon's needs and I can't just treat them as "parsons" and expect them to thrive. My male is still not stable, 8 months in my care, while the female is doing perfectly well.
Everything can be an issue to them. They decide how you will deliver enough water, what they are willing to eat and how it is to be presented to them, their caging, lighting and UVB exposure, and virtually every aspect that we have come to put into standard practice for other species.
I'm not saying that they are all this difficult. I'm saying that they require a lot more attention for what you will get out of them, than most other species. If big is your thing, ousteletti are much more amusing. Parsonii are essentially pet rocks that demand a lot and give very little.
I've had much more joy working with other species and I've had breeding successes with animals that few can keep alive, starting from the worst of the worst in terms of Wild Caught animals in poor condition.
My guess is that you have a lot of information to learn about parsons, before you acquire one as if you were "in the know", finding one wouldn't me a problem. There are lots of parsonii groups on facebook, a few experienced keepers here, and several famously inactive forums online. My advice is for you to visit these places, seek counsel from the keepers, and let them point you to your parsonii, when you have a thorough game plan in place, including a vet that is more experienced than just willing to see chameleons. Parsonii are amazing and iconic creatures, but they are not a project to undertake for a leisurely past time; they are all consuming and we need every available resource to establish strong populations in captive breeding programs.
Good luck.
