Mattress similar to Vi Spring Shetland Superb (soft tension)?

I am a tiny lady (5 foot 2, a bit under 7 stone). I have a Vi Spring divan and mattress combo with I bought some years ago in JL in 'medium' tension - but it is unspeakably hard for me despite the addition of toppers. I have always liked to sleep on my side, but cannot on this mattress as it hurts my hips. I have subsequently slept quite well elsewhere on a JL Vi Spring Beaulieu, and very well on a Shetland Superb (both in soft tension).
Do you make a mattress which would be similar in feel to either of these? I will pay pretty much whatever it costs to get a decent night's sleep (which I have not had in my own bed for many years!!)