Sgent5111

I'm new here and I'm not sure where to ask for help. I have a 2004 GMC 1500 Sierra 2wd. Extended cab, 5.3l v8, automatic. The drivers bucket sags really bad. I feel like I'm going to have to look under the steering wheel to drive it. My truck has not quite 56,000 miles on it. It still has the original serpentine belt, spark plugs, disc pads, etc. It has never had anything heavier than ice chest in the bed. I need to get something to lift the rear of the bucket UP. I had found a kit that installs between the floor and the bucket seat frame but I cant find it again. Anyone have an inexpensive fix as I'm 63 and on disability. Thank you for your time.