Do you mean a repair kit for the leaking tap? I don´t know, it´s difficult to find some of the parts for the Rotax MZs.
Maybe you can ask
www.motorradente.de , he still has many parts which are not listed on the homepage. The best is to write him an E-mail.
Regards, Martin.
P.S.: Please don´t embed or copy pictures from other sites of the net... it´s better just to post the link to the picture.
I will fix that.