Siemens Washing Machine Temperature Sensor NTC00619287

Do you sell the seal/gasket that this sensor fits into? I have a Bosch WKD28350GB/04 washer dryer and it leaks due to this sensor/gasket not fitting as snug as it should. The sensor/gasket assembly worked its way out completely which led to water all over the kitchen. I cleaned the gasket and senor and refit it into the machine, but it doesn't feel as snug as I would expect. When doing a wash now there is a slight leak from the NTC sensor/gasket assembly which I think a new gasket would solve.