Torsion Keys for a 4x4 Suburban

My wife drives a 97 4x4 suburban and has finally agreed to let me drop it. Unfortunately, the most drop I can find for the front is 3" torsion keys.

Is there anything/anyway else out there to drop the front end of this vehicle more than 3"? I would like to AT LEAST drop it 5, but preferably even more.

If anybody can lead me in the right direction, it would be greatly appreciated....I've been searching all night and cant find anything.

ur stuck with 3in torsion keys...
i went thru the same deal with my 99 tahoe...
so i went with the bell-tech 4wd drop, 3/4.. put 22s with 305/40s.
theres pics in my profile if you wanna see..
also whenever i was towing and i hit a dip in the freeway my rear wheels would rub so i put helper bags in the back with 3/8s valves,3 gal tank, small viair, helps alot with towing..