Casey from SWISCO responded:
December 12, 2023
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 for 21-175
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