Bi-fold door replacement parts

A quick learner from Vernon hills Il says:
I see your part numbers 21-029 Pivot Top,21-030 Bottom (Outside fixed I assume) covers both top and bottom on pivot side. And 21-028
covers the floater or inside, what part number covers the bottom "mate" of 21-028? I will thank you in advance for any help you can provide. Your speed and cooperation on a rapid reply will greatly be appreciated.

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Paul from SWISCO responded:
Thanks for posting. The 21-028 can actually be used as a door guide for both the top and bottom.
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