Amazing when you want to fix your bed how much time you can spend researching. I found this at Flobed, not sure if they would even sell it to me not in a set, but it sounds interesting. I know Jim talked about zoning. I don't think I could make my own because I can't find good foam locally, and I don't do well in ordering sight unseen either. So I do have foam for my shoulders and hip area, but I need firmer for the legs and lumbar. I know because my legs hurt when I had the topper too soft, but the hips didn't hurt then. SO I am just thinking out loud and hoping for some insight.

http://www.flobeds.com/vZone.htm