Curved shower door is broken on the lower opening part

A home owner from Oregon City, OR says:
This old shower has been broken since we bought this house 4 years ago but it's functional. I'd like to finally fix it! The upper tracks appear to be intact (not pictured) as does the bottom component that's close to the wall. The lower piece that's on the opening side is completely broken and/or missing?

Help please!

Thank you!

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Tom from SWISCO responded:

Thanks for reaching out to us. It's tough to be sure, but this bottom guide here looks similar to our 10-063 , along with the 10-064 pivot. Look these two parts over and let me know if you agree. 

A home owner from Oregon City, OR says:
Ok, yes, those look correct! Thank you!
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