Eaton axle parts

Can anyone help I need some parts for a Eaton two speed axle fitted to a Atkinson Borderer mk2 1973 tractor unit
( Brake drums, Shoes, and adjusters). I know they are a Lockheed brake system.
My local factors have drawn a blank and can’t find anything at all on there systems.They say if I had some part numbers they may be able to cross referance them. Any ideas please… :confused: