Here is a pic of the old seats. The seat on the left is still intact. On the right is whats left of the cold seat.
Close up of the seats threads that I peeled out of the valve body.
As I said the threads in the valve body were no longer present to say the least to screw a new seat into. I tapped it to a larger seat. These next two pics show the size difference of the original seat on the left and the larger replacement seat on the right that was cut down to the proper lenght.