Solenoid needed for Carron Cordon Bleu 5 Deluxe?

Hello

We have just bought a house which contains a spotless Carron Cordon Bleu 5 De Luxe gas range cooker. It's a rather marvellous thing but unfortunately the main oven doesn't work.

There is no sound or gas or ignition when I turn the main oven control on and I think it needs a new Solenoid from researching it, but am finding it impossible to get hold of one.

Does anyone have any spare parts for this oven?? It seems such a shame not to repair it if we can as its obviously worked and been looked after for 30 odd years!

Many thanks
Katie