93 rear end sag

Rear end sags, I know I can change the fiberglass leaf with another junk leaf, for a great cost or I have heard about coil overs for the struts (the ones in the car are shot. Problem is car is for the kid runs great but not worth the 400 to 500 for the coil overs, How can I raise the rear end for the least amount of money (spending it all keeping the burban on the road LOL)

I had to replace the leaf spring in my 93, the ends were just about worn off. I think it was around $150-200 new