Catalogue refers to Z TX TXP R,2WB. I expect you will know if you have the vehicle.
MORRIS COMMERCIAL L2 T2 1933-35 King Pins and Bushes
Morris 10, Series M & Morris Commercial, 1945-1958, King Pin Set, NOS.
AUSTIN CAMBRIDGE & MORRIS OXFORD 1959 - 1971 PAIR OF KING PINS WITH FULCRUM PINS
Morris Commercial, 1933-1955, Remax King Pin Set, NOS.
NOS Brivec king pin bush set Morris Commercial 5 / 6 ton truck 1938 - 1954