How come you have Journey to Mysterious Island, the 2nd movie, with the Rock, but not the first?
Actually, it looks like we do have that DVD. The first one is called Journey to the Center of the Earth, and you can place a hold on it here. However, Dwayne Johnson did not appear in the first one. That part was played by Brendan Fraser. He dropped out when the sequel was casting, and Dwayne Johnson took the part.
Hope this helps!