Hi NYC 71,
I have 71 LC was originally auto, the cross member ends were "wrapped" in a rubber block insulator when I purchased the car. I believe they were factory fitment.
May still have them in the shed if you are chasing pictures, I didn't use them when I fitted the 4 speed,
yeah mate that would be great if you could get a picture, can't seem to find much about them or if anyone makes an aftermarket version