Trooper / Trident rear seat comfort

Hi everyone, 
has anyone improved the comfort of the rear seat in a Trooper / Trident ? 
I'm thinking of using a topper or changing the foam. 
Our's is a 2014 with only 30000 miles so not heavily used. 
Thanks
Pete

I don't think you can make major changes to the thickness of the foam without interfering with the Z-fold mechanism. We use a mattress topper to improve comfort for sleeping.

Thanks Roopert, 
 I have also noticed that the older vans have a bolster on the front edge. 
Maybe some new denser foam with a bit of shape. 
I think that I will see what a local trimmer can offer. 
Pete