Wanted seat cushion for Halmatic jockey seat

[Miller]

Does anybody have or know where to get the seat cushions for the Halmatic double seats. They came off an Arctic 28.

I have acquired a pair of the seats, very kindly, off another ribnet member but one of the seats has bad stitching and the foam has degraded.

Before I try to get it recovered I was wondering if anybody knows where I can get one or even a set with the back rest?

Thanks