steering shaft coupler clamp

A few years ago, I was rebuilding the steering coupler in one of my 1970 Darts and was able obtain a big wire clamp that goes over the coupler and holds the cap on. It came with a Chrysler service bulletin that gave detailed instructions on rebuilding the joint and installing the clamp, which had ends that fit inside the roll pin.

I still have the info on where I got it - Mike Randall, through a site called www.mopar4sale.com I went to the site but can't find the part anymore. Does anybody know where I might be able to get these???