We have a couple pivot shoes in this style, but I don't know what your dimensions are so I cannot identify the best match. Start by looking at our 15-178 and 15-188. One of these may be what you want.
A contractor from Colorado says:
November 26, 2018
Tom responsed earlier on Nov. 29. Here are a few more shots. 1 1/4" wide x 2 1/16" tall x 1/2" thick.Thanks Greg.
Paul from SWISCO responded:
November 27, 2018
From your photos and dimensions, I believe our 15-188 pivot shoe would be a good fit. Check it out and let us know what you think.