Try X-Pole. They’re excellent quality poles and very, very safe when installed correctly. I think they’re good for up to 9ft out of the box, but you can purchase extensions to go higher. You have the option of either a pressure mounted pole, or a free-standing stage. I recommend checking out the X-Pole site and contacting X-Pole directly to see what would work best for you. Their customer service is superb.
X-Pole is a little price-y but def. worth it. If you’re tight on cash, check around and see if you can buy a second hand X-Pole. You’ll want to avoid any cheap, Peek-a-boo-type poles as they are not safe for trick training.
I also highly recommend a crash-mat. Again, it’s a bit expensive, but totally worth it. I can’t even count how many times mine has saved my sorry butt. I purchased my crash mat from yogaaccessories.com
Best of luck and let us know how you make out with finding a pole! 🙂