If you really want one Skyjacker sells just the link based on lift size. I did a quick search and found they have one for 3-4" lift and 6-9". I'm sure you could find other brands that make one too. I think just about any auto parts website would sell it.
mine came off (front & rear)....and the only time i miss them is towing a 13' shasta.sways some kinda bad above 55mph.:doh0715ulls everything else fine.
but yeah.....like gmartin said, broncograveyard has them.