merc 250 jet

so my buddy has a 2005 seadoo challenger that is powered by a 250 optimax jet. I hear these things are discontinued, so does anybody have a lead on who supplies parts for these things? hes having great difficulty locating parts for the jet. Mainly the wear sleeve. the seadoo guys say go to merc and the merc guys say go to seadoo. its a vicious cycle that seems to have no end.

I know this is an old thread, however aside from very early V6 sport jet wear rings, all V6 rings are the same and readly available.