PART NO.  SPL.PAGE  DESCRIPTION                                                          
ACA5118   TC.J.1    Clip for seal (small) (2) -(rack assy, steering, Twin Cam)
ACA5118   16.J.1    Clip -seal -small (2) -(rack assy, steering, 1600 and 1600-MK-II)-
    changed to 3H2963
3H2963    16.J.1    Clip -seal -small (2) (rack assy, steering, 1600 and 1600-MK-II)-
    was ACA5118

ACA6030   15.J.1    Clip assembly for seal (large)(2) -(rack assy, steering, 1500)
ACA6030   TC.J.1    Clip for seal (large) (2) -(rack assy, steering, Twin Cam)
ACA6030   16.J.1    Clip -seal -large (2) -(rack assy, steering, 1600 and 16000-MK-II)-
    changed to BMK924
BMK924    16.J.1    Clip -seal -large (2) -(rack assy, steering, 1600 and 1600-MK-II)-
    was ACA6030

ACA5118 is the clip for the Small End of the rubber boot for the steering rack on the MGA.

Part number ACA5118 changed to 3H2963 for the 1600 model.


Clip Large ACA6030 BMK924

Clip Small ACA5118 3H2963

Rubber Seal 130801 AAA1682

The clips shown are from Moss Motors, USA.
They are okay, if you buy the ones noted as "original type".