Not a problem bro, that´s why we are all here on this forum, to help eachother!!! Jacob Fuller (sundown) knows where you can get 8" aeroports, but they are expensive!! If i were you, i would use 8" PVC tubes and build your own flares with a heatgun and a metallic bowl, i´ll post a vid at the end of this post on how to build them, that´s me with 6" PVC tubes by the way.
Another way would be using 8" sonotubes, or if you want a FREE way, well, you can go to a large format printing company, their banners come inside of a 8" strong cardboard tubes, you can use them as ports and flares should be easy to build, just cut the end of the port on strips and tape them together or fiberglass, should be easy!!!
This is the vid i told you: