one of members, I think it was RoostiusMaximus, had mentioned a year ago, that cases were discontinued.
companies have a 10 year "production law/rule" from the time the bike was last produced, to continue making parts available for that particular model...that ship sailed in 2014, since the 500 was last produced in '04.
that was why I mentioned in kmc14's K5 case thread, when he had no luck finding a set...that I said, "I think we all saw that coming".