My apologies for the lack of description, its an 1983 300sd w126.
The brake booster lines were damaged at the white 'orifice valve' thingy near the brake master cylinder when I was replacing the booster.
The kickdown cable plastic housing was broken as I removed it to replace the o-ring and service the transmission because it was sticking in gear and acting as if it were in a constant "kickdown mode" which upon removal of the pan I realised was due to a sticking of the piston that goes into the valve body which is actuated by the lever that is connected to the kickdown cable.

To my understanding the part number for the brake line is 126-430-12-29

And the kickdown cable is 126-300-17-30

I purchased a later style kickdown cable assuming it would fit or that I could make it, but I couldn't. And after all my searching I find it hard to believe that there isn't a solution yet found.