Who and where should i buy a new top for a 69 barracuda

The glass window stays zipped in all the time in my car.

The boot is attached at the front to the rear of the seat. I've never had an A-Body vert, so I'm not 100% sure on this, but I believe they mount the same too. The front of the boot slides into a retainer and is a pain to remove or install, so it stays in place. The boot gets either draped over the seat back or (usually) draped back into the well where you can't see it.

As was mentioned, watch what you put in the trunk. Don't put anything under that well. I had a friend blow a window out at Carlisle when he forgot about the chair that had been pushed under the well. He put the top down and it hit the chair and shattered.