Passports used the trailing link suspension, the CTs went to telescopic forks. DrATV has replacement for the lower link assembly , shock pivots, with sealed bearing design.
Yes, the DrATV site is not a modern site...

Yahoo C70 group is very active and helpful with lots of knowledgeable folks, join it if you cannot find the answer you seek here...
DrATV has a surprising number of parts for the old leading/trailing link design suspension. So, I would order everything you can get/need from them.
David