Hmmm... you may not be able to lower the stock buckets because of their shape and the way they contour the frame. If you were to make your own, you may be able to mount them lower, but you will also need to drop the center bracket as well to keep everything in line...
If you need just a couple inches in the front, I recommend looking into some coil spacers or some springs from 95-01 Explorers as both will give you about 2"