Mike,
Not sure where in the RDU area your daughter lives, but here are places to find ERC.
If she’s near North Raleigh, as ScottM said:
Murdock Building & Portable Sawmill
Rolesville, NC
Jack Murdock
(919) 669-1859
Ncsawmill.com
If she is near Durham,
Bahama Wood
Ricky Pope
1407 John Jones Rd
Bahama, NC
919-485-9996
Not sure if they sell ERC, but two more sawmills in the Raleigh area to contact
Raleigh Reclaimed
2101 Harrod St
Raleigh, NC 27604
1-800-940-8615
QuarterSawnOak
Scott Smith
6664 Beaver Creek Rd
New Hill, NC 27562
919-291-0095