Staying in Bali for 2 months and know the mattress we will sleep on is too hard for me. Have been looking at my options to take, some very expensive, but came across in Spotlight, what I would call "eggshell Foam" mattress topper today. Has anyone ever seen any foam, (kingsize bed, and would need 5cms thick), where I might be able to buy in Bali instead? Or, any other suggestions!!,