The web netting is just a conceptual idea. Seems like it would be easier to use for your hanging arrangement than individual straps, and distribute the load more evenly. I know that you can get non-elastic cargo nets at various places ... see http://www.nextag.com/cargo-net/compare-html
for some wide strap options that would avoid the narrow bungee stripes you mention.
I am still noodling-around for a solution for garage floor storage and considering some eggcrate foam or something like that. Eggcrate foam is not very thick and probably would not do the job, but furniture-quality thicker foam is expensive. I may end up with a couple of couch cushions "liberated" from the neighborhood curbside trash pickup, although that would be a tough sell to the wife!