We are looking for a tour for 2 or 4 passengers for the Great Wall for 4 or 5 hours

Our cruise departs November 10th from Tiajin. We only have a few hours in Beijing in the morning. Can we arrange a tour for only 4 or 5 hours, only to see the Great Wall. Can you give us the name of a travel agency to contact there. We arrive Beijing, to the hotel Double Tree, the 9th at 8.30 h. at night.