Comparable mattress to Staples "Cambridge"?

My wife and I recently had the chance to sleep on a Staples "Cambridge" (1000 pocket spring) mattress that seems to be out of production now. We loved it - but truth to be told, coming from a foam mattress, anything firmer is great.
Can't seem to find this model anymore, but I was hoping that you could suggest a similar model in your range.
Other details I could gather from the mattress:
-wool
- "pocket extra"
-no turn, rotate regularly
-suitable for beadsteads (we have a divan)