1972 C10 auto to 4 speed conversion

[quentin hill]

Hope I can explain this so you can understand what I am talking about, I want to do a 4 speed manual conversion but I seem to be missing a piece on my frame rail. There is a bracket that holds the Z Bar on the frame. I cannot seem to find this part anywhere. I was hoping someone on here has done this same conversion and knows how to either find this piece or fabricate it. Please provide pictures if you have them.

Thanks in advance for your time