The CCU model SG2000 is now about 15 years old and its many of the spare parts are now obsolete.
The OEM supplier stopped producing the parts few years back and the stock with Uster also got exhausted.
So the solution is replace the SG2000 with the new CCU and this will ensure trouble free working and support for next several years.
Please refer to the enclosed Info mail on this.
We are sorry about this but please explain this suitably to customer.