Bottom rail for Stanley bifold

A home owner from Huron SD says:
Lookin for a low profile bottom rail for 2 sets
of Stanley mirrored bifold doors. Vintage around 1999 or 2000. Each rail was 1" × 1" x 60" long. I need a low profile rail after installing a new floor. Will the 21-455 work? Does it come in any other color? Will I need to order extra parts. Thank you
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Casey from SWISCO responded:

Hello,

Your pivot bracket is no longer made, unfortunately. We do not carry the track compatible with this pivot bracket but you are correct that we carry the newer style track from Stanley, including the 21-455 that you mentioned. The determining factor will be how the track dimensions and 21-175 bracket used with these tracks compare to yours. It is available in white on our product page but let us know if you are interested in a specific color and we'll be happy to confirm if it is available. Thank you. 

Dimensions of the low profile track assembly.
Dimensions of the low profile track assembly.

Dimensions for 21-175
Dimensions for 21-175

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