To give you a little more specific information. You would probably have to have a rental car to go these places, assuming you do here are some directions.
The Premium outlet mall is at the Lake Buena Vista Exit off Interstate 4. At the first traffic light on the opposite side of the interstate from Disney Village turn left and that rode will take you there. If you continue straight on that road and do not turn in a few more miles you would pass the Lake Buena Vista outlet mall, it is smaller and also less crowded. Yet farther down that road, about 2 miles past the LBV mall is a Walmart and they have a large selection of Disney merchandise.
Many of our British guests spend alot at the outlet malls. I have been told that prices here are much cheaper and I have known 2 families that left all their clothes here that they brought because they bought so many new clothes they could not take them all back!