Sadly, I do not have any specific names other than my landlord for my house. I will say though that I have visited Ashbrook Apartments, though that is farther away. I have also been to a prof's apartment in Chelsea Commons and have heard a few grad students say they live there, so there's that. Are you in contact with any current students in your program? They might be able to help. Also, you could consider looking at UNC Chapel Hill Class of 20XX Facebook groups and find people who need summer subletters. Then you can come and check out places when you are actually here. This requires coming a little early into the summer, but it's an option. Sorry I can't be of more help.