Outdoor chair cushions

Qashqai66

We have a pair of Dukdalf folding chairs which are the only ones we can find which are comfortable.  However, after some time of sitting on them we find we wish we had some cushions as they get a bit hard without.  Has anyone found cushions which will fit
Dukdalf chairs?  A web search has revealed some cushions made by Outwell for similar looking chairs but I am not sure if they will fit on the Dukdalf because of the rollshaped head rest.