Maybe KL Racing has something off the shelf? I don't know.
Otherwise they would need to be custom items.
We could ask @AshDVS to do a run of them for us, if there's enough interest.
JFTR, 140/164 up to 1973, and 1974 models have different ones, and 1974 Panhard rods are different from 240s, making 74 Panhard rods yet another One Year Only Special Part for 140s.