please dont kill me, looking for rear leaf shackles

I ran shackles, and air shocks without the extensions, I didnt know as I bought it like that. worked fine until you go over a speed bump, then the floor sounds like its going to be ripped out. Imagine a huge bass drum going off every time the shocks extend to their stops! If shackles are not made to lift the rear, they sure do a good job of it on the side.