Southern Idea Home show is this coming up weekend (Sept. 25 - 27th)at the State Fairgrounds, and there will be lots of vendors.
I'm just east of Raleigh, so not sure if the vendors I use will go that far, but worth a call.
Roofing I've used Jonathan with On Tops Roofing 919-235-5493
and Bob with Carolina Roofing & Vinyl Siding 516-369-6787
HVAC I use Stephenson HVAC 919-329-0686
Stephenson put the HVAC system in my addition, and On Tops did the roofing for my addition. I've also used them on real estate properties I manage. Depending on what part of Durham, that may be a bit out of their coverage area, but give them a call and see.