Flying Circus in Durham,
Import Car Center in Raleigh,
Sports & Classics in Raleigh,
Apex Vintage (Off U.S. 70 between Raleigh & Durham)
EDIT: Also suggest to them that they join the NCMGCC and attend their meetings and tech sessions. They will get to know a good support group in the community and the tech sessions are typically held at Flying Circus which would introduce them to the closest service garage.