what setup are you running suspension wise that are bottowing out that bad? what shocks, shackels, add-a-leafs?
the front bumps stops are very differen from the rear ones. there are 2 to a side. one on the upper a-arm, one on the lower a-arm. they are tear drops of rubber about 2" or in length then cut in half. kinda hard to describe.
I imagine that they probably are the same, but you'd have to check that.