Need advise on repair of Hildebrand knock offs

[Dog427435]

I noticed a noise / feeling coming from the left rear wheel. Removing the wheel and inspecting the area I found 1 of the pins had sheared off. The rear portion had fallen through and was gone. Further inspection found 4 of the other pins will turn in either direction, but not tighten or loosen, and the other pin does not move at all.
I have not gotten the car on a lift yet and its tough to see how this assembly comes off laying on my back - anyone familiar with these knock off assembly's?

My question is - are these pins supposed to be set firmly or not? Does it matter that these other pins turn and could that be a contributing factor in why this one pin failed?

Any idea's as to where to locate the proper parts for this set-up, or can I just check my local supply house for a similar piece?

Thanks






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