That appears to my eye as the air seat version of the Seats Inc of my Ferris's standard stock seat. I couldn't get one aftermarket as Seats Inc only does OEM. Speaking as a former outside B2B sales and then sales manager, I don't blame Seats Inc.
My musing aside, that seat is the I3A. I found out about it and shared what I found out about it
on post number 7 on the first page of this thread.
Anyway, I would have really liked to get my hands on one.
I wasn't really planning on sharing this end-of-December video as I'm looking to do a better review of the V5400 air seat once it warms up. Even so, gleen what you wish from what I did think to share in my cold December garage.