Kevin, Thanks for the suggestion. I contacted City Boat Yard and they look like a good choice.
In case anyone else needs information on Charleston
Boatyards, I also contacted Pierside Boatworks. From what I can find online, these are the only 2 that can handle our IP40. One difference between the 2 places is that Pierside locks the boatyard up on the weekends so you will not be able to access your boat.