need help finding the correct size and type

A quick learner from cragsmoor, ny says:
no markings. The bottom part that's missing looks like on part: 15-188

I put the sizes in the one photo. I cannot find an exact match. Please advise.
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Paul from SWISCO responded:

I see how you were able to see similarities between your pivot shoe and the 15-188. However, the manufacturer has discontinued that pivot shoe. We now offer our 15-167 with the 26-021 pivot bar. The screw hole placement of this bar is 1-3/8" from the front tip. Compare the two parts mentioned to yours and see if these will work.

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