Need Help Identifying Correct Replacement Parts

A home owner from Medford, OR says:
The bottom track part is IMG_4656 and 4657. The top track part is IMG_4701 and 4703. The bottom track looks like IMG_4704.

We need replacement parts for both the top and the bottom and don't know what parts to order from our site. Would appreciate if you could reply with the correct part numbers.

We also do not know how to adjust the bottom track part to actually stay in the bottom track IMG_4704. Do we have the wrong part currently on the bottom track?

Thanking you in advance for your help.
Thumbnail of the uploaded file named IMG_4704.JPG
Thumbnail of the uploaded file named IMG_4703.JPG
Thumbnail of the uploaded file named IMG_4701.JPG
Thumbnail of the uploaded file named IMG_4657.JPG
Thumbnail of the uploaded file named IMG_4656.JPG
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Paul from SWISCO responded:

Thanks for reaching out to us. We suggest our 23-046 for the top and 23-021 for the bottom. The 23-021 white nylon foot locks into the track and moves up and down as you slide the doors. The adjustment is the 23-046 top roller. Take a look and see what you think. 

A home owner from Medford, OR says:
Paul - Thank yoU! I have placed an order for the parts identified. Appreciate your help in identifying the correct part and explaining how the bottom mount guide works.
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Paul from SWISCO responded:

It was my pleasure. Good luck with the repair and let us know if you need anything else!

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