The only lightweight suspension parts that were Chrysler sponsored were the special parts that were created by Detroit's own "Trick Titanium" for the Missile cars.
I don't think that center link is Titanium, but who knows. Could also be beef material difference between manufacturers and or replacement companies.
I have a suspicion that there are long lost misplaced Trick Titanium parts lurking around in attics or old stock piles.
I went to their Troy, Michigan location back in the 90's and got to fetch quite a few fasteners from their stock pile for the missile cars and other who jumped on the band wagon.
Wish they had made some Titanium K-members. Much better than the magnesium k's that cracked in half on a wheel stand.