Hi Mark,
They put a brand new boot on but used the furniture off my old one - motor for spoiler etc. I didn't ask for the old one because it was just the rusty shell. I've taken to wiping around the inside lip to keep it dry as you're right, water & condensation gathers there. It's just a bit of dodgy design, unfortunately. Good luck with yours - is it 6 or 7 year corrosion warranty?