Go here:
Shocks for Sportsters (they have shocks and block kits both) and here:
Lick's Custom Cycles ... custom motorcycles, tanks, parts and accessories, plus new and used bikes, at good prices.
There are simple and reasonably cheap ways to get it done. And you don't have to do the front. It will look good not lowering the front as long as the back does'nt drop too low.