Hi sdmark,
Besides Dreamfoam and Brooklyn Bedding which have quite a number of hybrids … Arizona Premium has some listed here and Bay Bed and Mattress also has component pocket coil / latex mattresses.
There are many people who prefer a less resilient quilting layer above latex (which is quite “springy”) so this is a matter of preference. The hyperflex adds a softer surface feel to the mattress.
A post from a couple of days ago also asked about the change in the foam and you can read some comments in the links I included in my reply in post #18 here.
It’s always worth a try and in some cases it can make a difference but it’s certainly not an “ideal” fix and if the top foam has softened too much then it’s usually time for a new mattress.
Phoenix