I believe these are originals, at this point the hinge points are very brittle, so hope you hear from someone who knows where to get new ones. I have had no luck so far, but haven't looked "really" hard.
Russ, I will take some pictures this weekend and post, Someone along the way, disconnected it, and I haven't yet reconnected. I am having some work done on my speedometer, and when that is done, he offered to take a look at what would be needed.
Good Morning
My 66 uses transmission fluid. There are kits for refilling available that make it less messy. But I can also find and scan the instructions to you if you wish.