There is one pretty close - say 5 miles (absolute max) from DTD. Basically at the end of Hotal Plaza Boulevard you go right and it's a few miles along that road (535?) on the right. It shouldn;t be too much in a taxi.
I have never used the buses in Orlando so I'm not the best person to comment on them, but I would think the taxi might be a better bet for a)time and b)ease of carrying all the stuff you will buy there
