can i get spare parts for a morphy richards steam generator?

my morphy richards steam generator has a broken pressure release? part. It is a black piece of plastic with 4 screws holding it on situated on top of a large round metal chamber. There are 2 pipes connected to this, 1 pipe goes to the iron itself and the other leads to a hole on the bottom of the gnerator unit. Inside the part in question is a spring and a plastic washer. I have searched all the websites saying they do spares but they only do filters and cleaning accessories.