Honda comfort seat e-cushions, pretty expensive though. Been looking myself for a while, need something with a bit of grip myself! Toying with the idea of recovering my own, it can't be that hard! Wahoo I beat Nigel to answering a question!!!
I tend to specialise in the difficult ones that tax my intellect Not quite. Love Island Australia. ITV on demand! Edited to say that I've just realised there's a conflict of interest here. Intellect Vs Love Island?
https://www.viking-motorcycle-seats.co.uk/ They did my last seat, put gel in it and recovered with a more grippy alcantara type material, and it was better than the Honda comfort seat I have on this bike. There was also mention quite a while back of a guy in Wales who did good work too, I'm sure a search would bring up the details.
I've got a gel seat for sale if anyone's interested. I can't remember what make it is. I'll take a couple of pics and get the details when I get home if anyone's interested.
I think it was around 200 for the gel and the cover, with stitching that matched the colour of the bike.