Davy,
Plate 17 in the spares book shows three rubber bushes in the column assembly.
600368 – 22.1 x 36.7 x 28.6 long
601854 – 37 x 47 x 40 long
602169 – 26(?) x 43 x 32 long
Access for any is almost certainly going to entail dismantling the column to a lesser or greater extent.
B………….
Bernie