Contact Puckett, Sheetz and Hogan, Waccamaw Insurance or Associated Insurers.. You can source their numbers online or in the Yellow Pages. any of them should be able to help you out. You could also try Field Insurance. I've heard good things about them in the past...
The flood will be a FEMA program, as PD said, but any of them can assist with that. You may not be in a flood zone, but it still can't hurt to carry it...especially in certain areas of Socastee..