I just got off of the phone with the owner of Pro Flight. They are not out of business. Their website is currently down and under construction. They say it will be up on line next week. Stay tuned.
My Pro-Flight tower cracked and wasn't covered under warranty (boat was 2 years old). A big bummer for me. Hopefully you all have better luck than I did.
They are open, I work just down the street from them. See some towers come through my work getting powdercoated sometimes. They are still in business from what I see.