Another Soderhamn question!

We’re looking into the Soderhamn and seeing all the complaints about it not being comfortable and the hacks to make it more comfortable. It’s been awhile since I’ve sat on it, trying it out tomorrow but it seems like an ideal low couch for a pouncing toddler.

My question is, instead of buying foam separately, can you just buy extra Soderhamn cushions so you have 2 sets on the couch? Does anyone know if this is even possible to purchase?