Its not a seperate part you will need to make a couple of plates up and weld as it was an integral part of the one ton chassis.
I dont know what they do for the military . The other option would be a wedge in between the spring and axle to rotate it back to the correct angle for the uni joints HTSH

my mate had put on his 2a s3 lookalike 101 springs and the axle under them
looked cool

just a sujestion shouldent cost much proberbly £150 £230 you may also have to get the the spring mounts changed