Compartment Door Runners

As with all 70 year old things, they sometimes don't quite work. These are the bottom runners from one of the doors. The item below the spring is what slides on the brass strip underneath the door to the compartment. These will need some TLC. Interestingly, the packers (two square bits in bottom left) appear to be not original Gresley. Can someone identify what they are or where they came from?