According to the Korea Times, the K-shuttle foreigner-only bus tour has resumed it’s seasonal operation. Several routes are available, including a southwest and southeast tour of Korea.

  

Package: 1-4 night packages.
Transportation (Bus), Accommodations (Tourist hotel-two twin beds per room), breakfast, and some admission fees are included. English, Japanese, and Chinese speaking Tour Guides will be present. 35 people per bus.
Departure: 8AM Daily from Gwanghwamun, Seoul.
Cost: Prices starting at 239USD per person for one night/two day tour.
Contact: +82-1899-2508
K-Shuttle Website