The best night sleep ever, don't even move.

We sleep on this bed when where staying​at a friends home. This mattress is the most comfortable mattress we have ever ever slept on. It's 14 years old but you would never even believe it. I normally get up at least 3 times a night at home but every single time I sleep on this mattress I fall asleep on my back and wake up on my back don't even move and neither does my husband. We are trying desperately to find a mattress just like this and are having no luck because they say it's discontinued. Can you please tell me what mattress is the closest to this one.