Dear Michel: I take it you've successfully opened your unit and determined that the Rubber Contact is causing whatever problems you may have.
Are you talking about a Matrix with one octave of Nipples, and are only the NIPPLES worn/uneven? If so, a possible solution is a compound sold by Oaktree (oaktreevintagesales.com). Read their promotional description to determine if it iwll work. If you buy the product and are successful in making rthe necessary repairs, please do the Forum a favor by posting a follow-up message so all can learn from your experience. Thanks.
