Stryenboen, trying to pawn off a 500T as an acceptable representation of a 550F or 500K seat won't work...the 500T has the unsightly dip in sideview like some other Honda seats (cx500).
Just giving you a hard time.
Flatlander, it will be difficult to find the heat pressed vinyl like the original in brown. If it is out there, cmsnl might have it, otherwise it will be ebay currently the best bet of finding one.