That is the ultimate, off-the-shelf, CT70 assrest...comfortable, durable just what you'd expect from Honda, after 30 years of product development. We're talking light-years beyond K0-79 seating. That is, essentially a service replacement, for the last generation AB26 Dax circa 1996-98.
That's what's on my daily rider, beneath a different (aftermarket) cover. No issues with the pan, or foam and that foam is tough to improve upon.
If you happen to find one of these, snag it. They were added to the NLA parts list circa 2005.