I put in new GKN/Lobro axles in the 1982 300D. They came from Performance Products and I snagged them under one of their 15%-off sales that they used to have.
This replacement axle uses a later design where the can unbolts (instead of crimps) so the future boot replacement will be simple.
These are now family heirlooms, to be handed down from car to car and never to be sold to a non-family member.
Ken300D