[SlowPoke]

As I attempt to go through my recently acquired boat, I noticed the louvre for the AC output, which is mounted forward on the top shelf behind the settee, was displaced. When I went to pop it back in, I found the AC duct had become disconnected from the plenum. It appears to have been held on by  a heavy duty tie wrap. When I went to reconnect it, I found that due to a speaker that was installed by the previous owner, the duct could no longer be mated to the plenum. The area was now too crowded and the factory ductwork was not sufficiently long enough or pliable enough to work it around the speaker and back up to the plenum.

Is there a flexible 12-18" oval extension that I could use to bridge the two? Any ideas or suggestions welcome.