Tecnick tck 8522/2 oven

Power to the main oven has to go through the oven clock if time is not set main oven will not work also if clock set on auto time rather than manual oven will not work conversley if clock is faulty it will not work top oven is unaffected as oven clock auto timer cannot be used on top oven.try resetting power of and on again reset time on clock if clock not faulty oven will now work.

Does anyone know where to gets parts for this oven? Looking for the main over inner glass pannel.
Ryan