I have no idea of the procurement process but as a long time, 12 year, occupier of MB seats, and an ejectee myself. ( Mk 4 seat) I read most of the MAA report with more than passing interest.
The thing that struck me as very strange indeed is that installing the safety pin was part of the after landing checks and it was sometimes, often, done by feel !
In my day we did not install the pins until the aircraft was parked on the line, dispersal, and the the pins, seats and canopy, very carefully replaced.
Was there some reason why the RAF changed, or even allowed, these procedures as the report said?